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Toroidal moments and magnetic monopoles as complementary condensed-matter states

English title Toroidal moments and magnetic monopoles as complementary condensed-matter states
Applicant Fiebig Manfred
Number 147606
Funding scheme Sinergia
Research institution Departement Materialwissenschaft ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Condensed Matter Physics
Start/End 01.10.2013 - 30.09.2017
Approved amount 685'249.65
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All Disciplines (2)

Discipline
Condensed Matter Physics
Material Sciences

Keywords (8)

Magnetoelectric effect; X-ray diffraction; Multipole expansion; Multiferroics; Magnetism; Strong electronic correlations; Nonlinear optics; Density functional theory

Lay Summary (German)

Lead
We will investigate the occurrence of toroidal moments (magnetic vortices) and magnetic monopoles (magnetic charges) in two experimental and one theory group. Both long-range order and local manifestations of the two phenomena will be investigated. This will help to answer fundamental questions regarding the symmetry and structure of matter.
Lay summary

The search for novel states of matter and new types of order is one of the most exciting and fundamental aspects of condensed matter physics. Often such states remain hidden for a long time because there is no direct experimental manifestation of their existence. For example, ferromagnetism has been known for millennia whereas antiferromagnetism, in spite of being more common, was discovered barely 70 years ago. 

Presently, two states of matter that had remained elusive for decades are intensely discussed: toroidal moments and magnetic monopoles. The former describes a magnetic vortex which may be represented by a circular arrangement of rod magnets. The latter is the magnetic counterpart of an electric charge, colloquially speaking a north pole separated from the south pole of a magnet. It is the goal of our proposal to detect toroidal and magnetic-monopole moments in condensed matter systems.

We will discuss the microscopic origin of the two phenomena but also the macroscopic physical properties they are related to. M. Fiebig, ETH Zurich, will investigate macroscopic manifestations of toroidal moments and magnetic monopoles by nonlinear optics and magnetoelectric current measurements. U. Staub, PSI Villigen, will probe the related microscopic electronic interactions by x-ray diffraction. N. A. Spaldin, ETH Zurich, will develop the theory of toroidal moments and magnetic monopoles, and investigate their electronic origin and long-range order by density functional theory.

Direct link to Lay Summary Last update: 21.10.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Field-induced double spin spiral in a frustrated chiral magnet
Ramakrishnan Mahesh, Constable Evan, Cano Andres, Mostovoy Maxim, White Jonathan S., Gurung Namrata, Schierle Enrico, Brion Sophie de, Colin Claire V., Gay Frederic, Lejay Pascal, Ressouche Eric, Weschke Eugen, Scagnoli Valerio, Ballou Rafik, Simonet Virginie, Staub Urs (2019), Field-induced double spin spiral in a frustrated chiral magnet, in npj Quantum Materials, 4(1), 60-60.
Multiferroic phase diagram of E -type RMnO3 films studied by neutron and x-ray diffraction
Mukherjee Saumya, Shimamoto Kenta, Windsor Yoav William, Ramakrishnan Mahesh, Parchenko Sergii, Staub Urs, Chapon Laurent, Ouladdiaf Bachir, Medarde Marisa, Shang Tian, Müller Elisabeth A., Kenzelmann Michel, Lippert Thomas, Schneider Christof W., Niedermayer Christof (2018), Multiferroic phase diagram of E -type RMnO3 films studied by neutron and x-ray diffraction, in Physical Review B, 98(17), 174416-174416.
Dynamics of the photoinduced insulator-to-metal transition in a nickelate film
Esposito Vincent, Rettig Laurenz, Bothschafter Elisabeth M., Deng Yunpei, Dornes Christian, Huber Lucas, Huber Tim, Ingold Gerhard, Inubushi Yuichi, Katayama Tetsuo, Kawaguchi Tomoya, Lemke Henrik, Ogawa Kanade, Owada Shigeki, Radovic Milan, Ramakrishnan Mahesh, Ristic Zoran, Scagnoli Valerio, Tanaka Yoshikazu, Togashi Tadashi, Tono Kensuke, Usov Ivan, Windsor Yoav W., Yabashi Makina, Johnson Sten L., BeaudPaul, StaubUrs (2018), Dynamics of the photoinduced insulator-to-metal transition in a nickelate film, in Structural Dynamics, 5(6), 064501-064501.
Magnetoelectric multipoles in metals
Thöle Florian, Spaldin Nicola A. (2018), Magnetoelectric multipoles in metals, in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2134), 20170450-20170450.
Relationship between crystal structure and multiferroic orders in orthorhombic perovskite manganites
Fedorova Natalya S., Windsor Yoav William, Findler Christoph, Ramakrishnan Mahesh, Bortis Amadé, Rettig Laurenz, Shimamoto Kenta, Bothschafter Elisabeth M., Porer Michael, Esposito Vincent, Hu Yi, Alberca Aurora, Lippert Thomas, Schneider Christof W., Staub Urs, Spaldin Nicola A. (2018), Relationship between crystal structure and multiferroic orders in orthorhombic perovskite manganites, in Physical Review Materials, 2(10), 104414-104414.
Nanoscale design of polarization in ultrathin ferroelectric heterostructures
De Luca Gabriele, Strkalj Nives, Manz Sebastian, Bouillet Corinne, Fiebig Manfred, Trassin Morgan (2017), Nanoscale design of polarization in ultrathin ferroelectric heterostructures, in Nature Communications, 8(1), 1419-1419.
Dynamic pathway of the photoinduced phase transition in TbMnO3
E. M. Bothschafter, E. Abreu, L. Rettig, T. Kubacka, S. Parchenko, M. Porer, C. Dornes, Y. W. Windsor, M. Ramakrishnan, A. Alberca, S. Manz, J. Saari, S. M. Koohpayeh, M. Fiebig, T. Forrest, P. Werner, S. S. Dhesi, S. L. Sohnson, U. Staub (2017), Dynamic pathway of the photoinduced phase transition in TbMnO3, in Physical Review B, 96, 184414.
Interplay of Fe and Tm moments through the spin-reorientation transition in TmFeO3
U. Staub, L. Rettig, E. M. Bothschafter, Y. W. Windsor, M. Ramakrishnan, S. R. V. Avula, J. Dreiser, C. Piamonteze, V. Scagnoli, S. Mukherjee, C. Niedermayer, M. Medarde, E. Pomjakushina (2017), Interplay of Fe and Tm moments through the spin-reorientation transition in TmFeO3, in Physical Review B, 96, 174408-11.
Magnetic properties of strained multiferroic CoCr2O4: A soft x-ray study
Windsor Y. W., Piamonteze C., Ramakrishnan M., Scaramucci A., Rettig L., Huever J. A., Bothschafter E. M., Bingham N. S., Alberca A., Avula S. R. V., Noheda B., Staub U. (2017), Magnetic properties of strained multiferroic CoCr2O4: A soft x-ray study, in PHYSICAL REVIEW B, 95(22), 224413.
Crystal symmetry lowering in chiral multiferroic Ba3TaFe3Si2O14 observed by x-ray magnetic scattering
Ramakrishnan M., Joly Y., Windsor Y. W., Rettig L., Alberca A., Bothschafter E. M., Lejay P., Ballou R., Simonet V., Scagnoli V., Staub U. (2017), Crystal symmetry lowering in chiral multiferroic Ba3TaFe3Si2O14 observed by x-ray magnetic scattering, in PHYSICAL REVIEW B, 95(20), 205145.
Domain Wall Architecture in Tetragonal Ferroelectric Thin Films
De Luca Gabriele, Rossell Marta D., Schaab Jakob, Viart Nathalie, Fiebig Manfred, Trassin Morgan (2017), Domain Wall Architecture in Tetragonal Ferroelectric Thin Films, in Advanced Materials, 29(7), 1605145-1605145.
First-principles calculation of the bulk magnetoelectric monopole density: Berry phase and Wannier function approaches
Thöle Florian, Fechner Michael, Spaldin Nicola A. (2016), First-principles calculation of the bulk magnetoelectric monopole density: Berry phase and Wannier function approaches, in Physical Review B, 93(19), 195167.
Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films
Shimamoto K., Windsor Y. W., Hu Y., Ramakrishnan M., Alberca A., Bothschafter E. M., Rettig L., Lippert Th., Staub U., Schneider C. W. (2016), Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films, in APPLIED PHYSICS LETTERS, 108(11), 4944460.
Quasistatic magnetoelectric multipoles as order parameter for pseudogap phase in cuprate superconductors
Fechner Michael, Fierz Merlin J.A., Thöle Florian, Staub Urs, Spaldin Nicola A. (2016), Quasistatic magnetoelectric multipoles as order parameter for pseudogap phase in cuprate superconductors, in Physical Review B, 93(17), 174419.
The evolution of multiferroics
Fiebig Manfred, Lottermoser Thomas, Meier Dennis, Trassin Morgan (2016), The evolution of multiferroics, in Nature Reviews Materials, 1, 16046.
Element-specific magnetization redistribution at YBa2Cu3O7/La2/3Ca1/3MnO3 interfaces
Alberca A., Uribe-Laverde M. A., Windsor Y. W., Ramakrishnan M., Rettig L., Marozau I., Tonnerre J-M., Stahn J., Staub U., Bernhard C. (2015), Element-specific magnetization redistribution at YBa2Cu3O7/La2/3Ca1/3MnO3 interfaces, in PHYSICAL REVIEW B, 92(17), 174415.
Ferro-type order of magneto-electric quadrupoles as an order-parameter for the pseudo-gap phase of a cuprate superconductor
Lovesey S. W., Khalyavin D. D., Staub U. (2015), Ferro-type order of magneto-electric quadrupoles as an order-parameter for the pseudo-gap phase of a cuprate superconductor, in JOURNAL OF PHYSICS-CONDENSED MATTER, 27(29), 1-5.
Interplay between magnetic order at Mn and Tm sites alongside the structural distortion in multiferroic films of o-TmMnO3
Windsor Y. W., Ramakrishnan M., Rettig L., Alberca A., Bothschafter E. M., Staub U., Shimamoto K., Hu Y., Lippert T., Schneider C. W. (2015), Interplay between magnetic order at Mn and Tm sites alongside the structural distortion in multiferroic films of o-TmMnO3, in PHYSICAL REVIEW B, 91(23), 235144.
Magnetic order dynamics in optically excited multiferroic TbMnO3
Johnson J. A., Kubacka T., Hoffmann M. C., Vicario C., de Jong S., Beaud P., Gruebel S., Huang S. -W., Huber L., Windsor Y. W., Bothschafter E. M., Rettig L., Ramakrishnan M., Alberca A., Patthey L., Chuang Y. -D., Turner J. J., Dakovski G. L., Lee W. -S., Minitti M. P., Schlotter W., Moore R. G., Hauri C. P., Koohpayeh S. M., Scagnoli V. (2015), Magnetic order dynamics in optically excited multiferroic TbMnO3, in PHYSICAL REVIEW B, 92(18), 184429.
Primary ferrotoroidicity in antiferromagnets
Toledano P., Ackermann M., Bohaty L., Becker P., Lorenz T., Leo N., Fiebig M. (2015), Primary ferrotoroidicity in antiferromagnets, in PHYSICAL REVIEW B, 92(9), 094431.
Probing Ferroelectric Domain Engineering in BiFeO3 Thin Films by Second Harmonic Generation
Trassin Morgan, De Luca Gabriele, Manz Sebastian, Fiebig Manfred (2015), Probing Ferroelectric Domain Engineering in BiFeO3 Thin Films by Second Harmonic Generation, in Advanced Materials, 27, 4871-4876.
Ferroic nature of magnetic toroidal order
Zimmermann Anne S., Meier Dennis, Fiebig Manfred (2014), Ferroic nature of magnetic toroidal order, in NATURE COMMUNICATIONS, 5, 4796.
Magnetic field generated by a charge in a uniaxial magnetoelectric material
Fechner Michael, Spaldin Nicola A., Dzyaloshinskii Igor E. (2014), Magnetic field generated by a charge in a uniaxial magnetoelectric material, in PHYSICAL REVIEW B, 89(18), 184415.
Monopole-based formalism for the diagonal magnetoelectric response
Spaldin Nicola A., Fechner Michael, Bousquet Eric, Balatsky Alexander, Nordström Lars (2013), Monopole-based formalism for the diagonal magnetoelectric response, in PHYSICAL REVIEW B, 88(9), 094429.

Collaboration

Group / person Country
Types of collaboration
Prof. Jörg Wrachtrup, U. Stuttgart Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Alexander Balatsky, NORDITA Sweden (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Dr. Yves Joly France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Laura Heyderman Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Dr. Urs Staub, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Dr. Hubertus Luetkens, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Dr. Peter Derlet Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Prof. Pierre Toledano, U. Picardie France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Exchange of personnel
Prof. Maxim Mostovoy, University of Groningen Netherlands (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Stephen Lovesey Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Youichi Yanase, Kyoto University Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results
Dr. Eric Bousquet, U. Liege Belgium (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Prof. Andres Cano, U. Bordeaux France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Prof. Emeritus Igor E. Dzyaloshinskii, U. California, Irvine United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Ladislav Bohatý Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Lars Nordström, Uppsala University Sweden (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Fall Meeting of the Materials Research Society Talk given at a conference Domain Dynamics in Multiferroics 26.11.2017 Boston, United States of America Spaldin Nicola A.; Fiebig Manfred;
The 9th APCTP Workshop on Multiferroics Talk given at a conference Fun Stuff to do with Multiferroic Order Parameters 09.11.2017 Kashiwa, Japan Fiebig Manfred;
Nature Conference on Ferroic Materials: Challenges and Opportunities Talk given at a conference Novel Types of Ferroic Order – Revealed by Nonlinear Optics 25.10.2017 Xi'an, China Fiebig Manfred; Spaldin Nicola A.;
ETH Materials Day 2017 Talk given at a conference Shining Light on Oxide Electronics 18.10.2017 Zurich, Switzerland Thöle Florian; De Luca Gabriele; Spaldin Nicola A.; Fiebig Manfred;
J-Physics 2017: International Workshop on Multipole Physics and Related Phenomena Talk given at a conference Magnetoelectric multipoles: A first-principles perspective 25.09.2017 Hachimantai, Japan Thöle Florian;
International Conference on Strongly Correlated Electron Systems (SCES) Talk given at a conference Ferroelectricity, Multiferroicity and Superconductivity 19.07.2017 Prague, Czech Republic Spaldin Nicola A.;
International Conference on Strongly Correlated Electron Systems 2017 Talk given at a conference Domain Dynamics in Multiferroics 17.07.2017 Prague, Czech Republic Fiebig Manfred;
International Conference on Strongly Correlated Electron Systems (SCES 2017) Poster Magnetic symmetry and field-induced spin-textures in chiral multiferroic Ba3TaFe3Si2O14 17.07.2017 Prag, Czech Republic Ramakrishnan Mahesh;
Gordon Research Conference on Spin Dynamics in Nanostructures Poster Magnetoelectric multipoles and their effects in insulators and metals 15.07.2017 Les Diablerets, Switzerland Thöle Florian;
International School on Oxide Electronics Talk given at a conference Second Harmonic Generation 10.04.2017 Cargese, France Spaldin Nicola A.; Fiebig Manfred;
International School on Oxide Electronics Talk given at a conference Introduction to Multiferroics 10.04.2017 Cargese, France Fiebig Manfred; Spaldin Nicola A.;
CEMS-QPEC Symposium on Emergent Quantum Materials Talk given at a conference Ferroelectricity, multiferroicity and superconductivity 20.01.2017 Tokyo, Japan Spaldin Nicola A.;
E-MRS Fall Meeting 2016 Talk given at a conference Electric-field control of ferromagnetism using multiferroic domain transfer 19.09.2016 Warsaw, Poland De Luca Gabriele;
European Physical Society Condensed Matter Division Conference Talk given at a conference Hidden magnetoelectric multipoles in multiferroics and superconductors 04.09.2016 Groningen, Netherlands Spaldin Nicola A.;
Joint European Magnetics Symposia (JEMS 2016) Talk given at a conference Hidden magnetoelectric multipoles in multiferroics and superconductors 25.08.2016 Glasgow, Great Britain and Northern Ireland Spaldin Nicola A.;
Joint European Magnetics Symposia (JEMS) Talk given at a conference Hidden magnetoelectric multipoles in multiferroics and superconductors 21.08.2016 Glasgow, Great Britain and Northern Ireland Spaldin Nicola A.;
Gordon Research Conference on Muliferroics and Magnetoelectric Materials Poster Magnetoelectric multipoles: Atomic, bulk and surface theories 07.08.2016 Lewiston, United States of America Thöle Florian;
Gordon Research Conference on Muliferroics and Magnetoelectric Materials Talk given at a conference Merging Nonlinear Optics and Multiferroic Heterostructure Design 07.08.2016 Lewiston, United States of America Fiebig Manfred;
39th International conference on Vacuum Ultraviolet and X-ray Physics Poster Resonant X-Ray Diffraction from Magnetoelectric Multipoles 05.07.2016 Zurich, Switzerland Ramakrishnan Mahesh;
REXS 2016, the Hamburg Conference on Resonant Elastic X-ray Scattering Poster Multiferroicity in the chiral incommensurate helimagnet Ba3TaFe3Si2O14 13.06.2016 Hamburg, Germany Ramakrishnan Mahesh;
REXS 2016, the Hamburg Conference on Resonant Elastic X-ray Scattering Talk given at a conference Challenges for REXS today and tomorrow: A personal view 13.06.2016 Hamburg, Germany Staub Urs;
School on Light-Matter Interactions Talk given at a conference -ray spectroscopies for magnetic materials 15.04.2016 EPFL Lausanne, Switzerland Staub Urs;
DPG Spring Meeting Talk given at a conference Resonant Soft X-Ray Diffraction on Chiral Multiferroic Ba3TaFe3Si2O14 08.03.2016 Berlin, Germany Ramakrishnan Mahesh;
DPG Spring Meeting 2016 Talk given at a conference Room-temperature electric-field-induced magnetic anisotropy rotation in multiferroic heterostructures 06.03.2016 Regensburg, Germany Fiebig Manfred; De Luca Gabriele;
Fundamental Physics of Ferroelectrics workshop Talk given at a conference The macroscopic magnetoelectric monopolization in diagonal magnetoelectrics 01.02.2016 Washington D.C., United States of America Thöle Florian;
MRS Fall Meeting 2015 Talk given at a conference Domain Walls in Multiferroics as Functional Oxide Interfaces 29.11.2015 Boston, United States of America Fiebig Manfred;
MRS Fall Meeting 2015 Talk given at a conference Hidden monopolar order in magnetoelectrics and high-Tc cuprate superconductors 29.11.2015 Boston, United States of America Spaldin Nicola A.;
Electronic Properties of Modern Materials, Diamond Light Source Talk given at a conference Hidden monopolar order in magnetoelectrics 17.11.2015 Oxfordshire, Great Britain and Northern Ireland Spaldin Nicola A.;
Challenges in Multiferroics and Magnetoelectrics Poster The bulk monopolization in diagonal magnetoelectrics 12.10.2015 Jülich, Germany Thöle Florian;
Computational Nanomagnetism Seminar Talk given at a conference Hidden monopolar order in magnetoelectrics 27.08.2015 Stockholm, Sweden Spaldin Nicola A.;
Advances in Nanoscience Applications Talk given at a conference Magnetic monopoles and room-temperature superconductivity 12.07.2015 Cambridge, Great Britain and Northern Ireland Spaldin Nicola A.;
Frontiers in Advanced Materials Talk given at a conference Hidden monopolar order in magnetoelectrics 15.06.2015 Bangalore, India Spaldin Nicola A.;
Computational Quantum Magnetism Poster The bulk monopolization in diagonal magnetoelectrics 22.05.2015 Mainz, Germany Thöle Florian;
DPG Spring Meeting (Solid State Physics) Talk given at a conference Domain Walls in Multiferroics as Functional Oxide Interfaces 15.03.2015 Berlin, Germany Fiebig Manfred;
APS March Meeting 2015 Talk given at a conference Domain Walls in Improper Ferroelectrics as Functional Oxide Interfaces 02.03.2015 San Antonio, TX, United States of America Fiebig Manfred;
PSI Summer School on Condensed Matter Poster Magnetic Structure and Transitions in LiNiPO4 : A resonant soft x-ray diffraction study. 15.08.2014 Zug, Switzerland Ramakrishnan Mahesh;
Gordon Research Conference on Multiferroic & Magnetoelectric Materials Talk given at a conference Functional Domain Walls (and Interfaces) in Multiferroics 10.08.2014 Biddeford, United States of America Fiebig Manfred;
SPS annual meeting Poster X-Ray Diffraction studies on the Commensurate-Incommensurate Magnetic Transition of LiNiPO4 30.06.2014 Fribourg, Switzerland Ramakrishnan Mahesh;
APS March Meeting 2014 Talk given at a conference Strongly localized electronic screening of Mg intercalants in the Chevrel phases Mo6S8 03.03.2014 Denver, United States of America Thöle Florian;


Self-organised

Title Date Place
Focus Session: Dielectric and Ferroic Oxides 14.03.2016 Baltimore, United States of America

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
ETH Materials Day 2017 Talk 18.10.2017 Zurich, Switzerland Spaldin Nicola A.; De Luca Gabriele; Thöle Florian; Fiebig Manfred;
Khartoum Workshop on Advances in Material Sciences 2017 Workshop 09.01.2017 Khartoum, Sudan Thöle Florian;
African School on Electronic Structure and Applications ASESMA Workshop 19.01.2015 Johannesburg, South Africa Thöle Florian;
The European Spallation Source and Room Temperature Superconductivity Talk 09.10.2014 ESS, Lund-Brunnshög, Sweden Spaldin Nicola A.;
From Materials to Cosmology; Studying the early universe under the microscope Talk 24.01.2014 Tritech Consulting, Stockholm, Sweden Spaldin Nicola A.;
Scientifica ETH (Materialien am Limit) Talk 24.11.2013 Zurich, Switzerland Fiebig Manfred;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions ETH Materials Day 2017 International 2017
Media relations: print media, online media How Materials Science Will Determine the Future of Human Civilization MIT Technology Review International 2017
Talks/events/exhibitions Les femmes dans les sciences: briser les clichés Western Switzerland International 2017
Talks/events/exhibitions L'Oréal-UNESCO For Women in Science Awards Celebration International 2017
New media (web, blogs, podcasts, news feeds etc.) Posts by Nicola Spaldin The Occam's Typewriter Irregulars International 2017
Media relations: print media, online media It would be nice if there were more of us! AcademiaNet International 2016
Media relations: print media, online media Neue Wundermaterialien - Vom Labor in den Alltag Lindau Nobel Laureate Meetings International 2016
Media relations: print media, online media Aufbruch ins Oxid-Zeitalter Körber-Stiftung International 2015
Talks/events/exhibitions Deps - Alumni Meeting German-speaking Switzerland 2015
Media relations: radio, television Körber-Preis 2015 SRF 3SAT: NANO International 2015
Video/Film Nicola Spaldin - Körber-Preisträgerin 2015 International 2015
Talks/events/exhibitions From Materials to Cosmology; Studying the early universe under the microscope International 2014
Media relations: radio, television The European Spallation Source and Room Temperature Superconductivity International 2014
Talks/events/exhibitions Scientifica ETH (Materialien am Limit) German-speaking Switzerland 2013

Awards

Title Year
Fellow of the European Academy of Sciences 2017
Fellow of the Royal Society 2017
Lise Meitner Lectureship of the German and Austrian Physics Societies (DPG & ÖPG) 2017
L'Oréal-UNESCO For Women in Science Prize 2017
Materials Research Society, Mid-Career Award for creating a new theoretical framework describing multiferroics and for service to the materials community 2017
Thomson Reuters Highly Cited Researcher 2017
Thomson Reuters Highly Cited Researcher 2016
Koerber European Science Prize 2015
Thomson Reuters Highly Cited Researcher 2015
American Physical Society Outstanding Referee 2014
ETH Zürich Golden Owl Award for teaching excellence 2014
Qualifying exam and approval of the research plan for final admission to the ETH doctoral study. 2014
Qualifying exam and approval of the research plan for final admission to the ETH doctoral study. 2014
Qualifying exam and approval of the research plan for final admission to the ETH doctoral study. 2014
Thomson Reuters Highly Cited Researcher 2014

Abstract

The search for novel states of matter and new types of order is one of the most exciting and fundamental aspects of modern condensed matter physics. Often such states remain hidden for a long time because there is no direct experimental manifestation of their existence. For example, ferromagnetism has been known for millennia whereas antiferromagnetism, in spite of being more common, was discovered barely 70 years ago. Presently, two states of matter that had remained elusive for decades are intensely discussed: toroidal moments and magnetic monopoles. The former describes a magnetic vortex which may be represented classically by a solenoid bent into a torus or quantum-mechanically by a circular arrangement of spins or a particle called an anapole. The latter is the magnetic counterpart of an electric charge, colloquially speaking a north pole separated from the south pole of a magnet. It is the goal of our proposal to detect local as well as nonlocal manifestations of toroidal and magnetic-monopole moments in condensed matter systems. We will discuss the microscopic origin of the two phenomena but also the macroscopic physical properties they are related to. In particular we will search for novel forms of long-range order characterized by the spontaneous and uniform orientation of toroidal or magnetic-monopole moments. Although toroidal moments and magnetic monopoles have been considered as disjunct topics so far, they are in fact very closely related. The linke is that both are consequences of simultaneously broken spatial and temporal inversion symmetry and therefore inherently related to the magnetoelectric effect (a magnetization induced by an electric field and an electric polarization induced by a magnetic field). Therefore, it is another goal of our work to establish toroidal moments and magnetic monopoles as closely related complementary phenomena. Three teams will constitute the Sinergia collaboration. First, the group of M. Fiebig, ETH Zurich, will investigate macroscopic manifestations of toroidal moments and magnetic monopoles using nonlinear optics and magnetoelectric current measurements as detection techniques. Second, the group of U. Staub, PSI Villigen, will probe the related microscopic electronic interactions by using x-ray diffraction techniques. Third, the group of N. A. Spaldin, ETH Zurich, will develop the theory of toroidal moments and magnetic monopoles, and investigate their electronic origin and possible long-range order by density functional theory. With our Sinergia work we will investigate fundamental questions regarding the symmetry and structure of matter. On the other hand, a perspective on applications is also involved because of the magnetoelectric effect - and consequently the potential to control magnetism by electric fields - inherently related to the presence of toroidal moments and magnetic monopoles.
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