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Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen

English title Superconductivity and magnetism in strongly correlated electron systems
Applicant Sigrist Manfred
Number 163186
Funding scheme Project funding (Div. I-III)
Research institution Institut für Theoretische Physik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Theoretical Physics
Start/End 01.10.2015 - 31.03.2019
Approved amount 660'707.00
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All Disciplines (2)

Discipline
Theoretical Physics
Condensed Matter Physics

Keywords (7)

condensed matter theory; strongly correlated electron systems; unconventional superconductivity; heavy Fermion superconductors; topological superconductors; non-centrosymmetric superconductors; artificially structured superconductors

Lay Summary (German)

Lead
Supraleitung - unter anderem der widerstandsfreie elektrische Stromtransport - ist ein Phänomen, das durch wechselwirkende Elektronen in einem Metall bei tiefen Temperaturen erzeugt wird. In unkonventionelle Supraleitern erzeugen diese Elektronen neue Zustände der Materie, die das übliche Repertoire der supraleitenden Metalle erheblich erweitern und auch flexibler gegenüber äusseren Einflüssen machen.
Lay summary

Die Erforschung neuer Materialien mit ungewöhnlichen Supraleitungseigenschaften steht im Zentrum dieses Projektes. Darunter finden sich Materialien mit speziellen universellen Merkmalen, die sich aus der Struktur des supraleitenden Zustandes ergeben und unter dem Überbegriff "Topologische Elektronische Phasen" geführt werden. Zwei spezielle Verbindungen, Sr2RuO4 und SrPtAs, gehören zu den besten Kandidaten für diese Klasse von Systemen und stehen hier im Vordergrund, da ihre ausserordentlichen Eigenschaften konzeptionell in mancher Hinsicht noch ungenügend ausgearbeitet oder experimentell noch nicht verifiziert worden sind. Beide Materialien sind als chirale Supraleiter bekannt, deren Eigenschaften auf die starke Abstossung der Elektronen untereinander zurückzuführen sind.

Weitere neuartige Formen der Supraleitung kommen in Materialien zum Vorschein, die künstliche Schichtung und damit Bereiche reduzierter Symmetrie aufweisen. Diese künstliche Strukturieren kann dazu verwendet werden, supraleitende Zustände in spezifischer Weise zu manipulieren und so gewisse Merkmal zu verstärken oder abzuschwächen beziehungsweise neu zu erzeugen. Die Untersuchung solcher Systeme könnte neue Wege weisen, wie elektronische und speziell supraleitende Eigenschaften nach Bedarf geschaffen werden können, was in Richtung des gezielten Material-Designs geht. Tatsächlich ist dies eine subtile Angelegenheit, speziell wenn es um stark wechselwirkende Elektronen geht. 

Die Untersuchungen in diesem Projektes sind theoretischer Natur, geschehen aber in enger Zusammenarbeit mit experimentellen Gruppen. Während die Fragestellungen noch klar auf der fundamentalen Seite angesiedelt sind, besteht die Vision, dass verschiedene Aspekte relevant für künftige technologische Anwendungen sein werden.  

 

Direct link to Lay Summary Last update: 03.10.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
Spontaneous Thermal Hall Effect in Three-dimensional Chiral Superconductors with Gap Nodes
Yoshioka Nobuyuki, Imai Yoshiki, Sigrist Manfred (2018), Spontaneous Thermal Hall Effect in Three-dimensional Chiral Superconductors with Gap Nodes, in Journal of the Physical Society of Japan, 87(12), 124602-124602.
Superconductivity without Inversion and Time-Reversal Symmetries
Fischer Mark H., Sigrist Manfred, Agterberg Daniel F. (2018), Superconductivity without Inversion and Time-Reversal Symmetries, in Physical Review Letters, 121(15), 157003-157003.
Spin and Valley States in Gate-Defined Bilayer Graphene Quantum Dots
Eich Marius, Pisoni Riccardo, Overweg Hiske, Kurzmann Annika, Lee Yongjin, Rickhaus Peter, Ihn Thomas, Ensslin Klaus, Herman František, Sigrist Manfred, Watanabe Kenji, Taniguchi Takashi (2018), Spin and Valley States in Gate-Defined Bilayer Graphene Quantum Dots, in Physical Review X, 8(3), 031023-031023.
Two-Dimensional Topological Superconductivity with Antiferromagnetic Insulators
Lado J. L., Sigrist M. (2018), Two-Dimensional Topological Superconductivity with Antiferromagnetic Insulators, in Physical Review Letters, 121(3), 037002-037002.
Tailoring Tc by symmetry principles: The concept of superconducting fitness
Ramires Aline, Agterberg Daniel F., Sigrist Manfred (2018), Tailoring Tc by symmetry principles: The concept of superconducting fitness, in Physical Review B, 98(2), 024501-024501.
Theory of in-plane current induced spin torque in metal/ferromagnet bilayers
Sakanashi Kohei, Sigrist Manfred, Chen Wei (2018), Theory of in-plane current induced spin torque in metal/ferromagnet bilayers, in Journal of Physics: Condensed Matter, 30(20), 205803-205803.
Orbitally limited pair-density-wave phase of multilayer superconductors
Möckli David, Yanase Youichi, Sigrist Manfred (2018), Orbitally limited pair-density-wave phase of multilayer superconductors, in Physical Review B, 97(14), 144508-144508.
Identifying the dominant pairing interaction in high- Tc FeSe superconductors through Leggett modes
Huang Wen, Sigrist Manfred, Weng Zheng-Yu (2018), Identifying the dominant pairing interaction in high- Tc FeSe superconductors through Leggett modes, in Physical Review B, 97(14), 144507-144507.
Spontaneous surface flux pattern in chiral p -wave superconductors
Etter Sarah B., Bouhon Adrien, Sigrist Manfred (2018), Spontaneous surface flux pattern in chiral p -wave superconductors, in Physical Review B, 97(6), 064510-064510.
Interband interference effects at the edge of a multiband chiral p -wave superconductor
Zhang Jia-Long, Huang Wen, Sigrist Manfred, Yao Dao-Xin (2017), Interband interference effects at the edge of a multiband chiral p -wave superconductor, in Physical Review B, 96(22), 224504-224504.
Weyl-type topological phase transitions in fractional quantum Hall like systems
Kourtis Stefanos, Neupert Titus, Mudry Christopher, Sigrist Manfred, Chen Wei (2017), Weyl-type topological phase transitions in fractional quantum Hall like systems, in Physical Review B, 96(20), 205117-205117.
Surface magnetism in a chiral d -wave superconductor with hexagonal symmetry
Goryo Jun, Imai Yoshiki, Rui W. B., Sigrist Manfred, Schnyder Andreas P. (2017), Surface magnetism in a chiral d -wave superconductor with hexagonal symmetry, in Physical Review B, 96(14), 140502-140502.
Robust doubly charged nodal lines and nodal surfaces in centrosymmetric systems
Bzdušek Tomáš, Sigrist Manfred (2017), Robust doubly charged nodal lines and nodal surfaces in centrosymmetric systems, in Physical Review B, 96(15), 155105-155105.
A note on the upper critical field of Sr 2 RuO 4 under strain
Ramires Aline, Sigrist Manfred (2017), A note on the upper critical field of Sr 2 RuO 4 under strain, in Journal of Physics: Conference Series, 807, 052011-052011.
Thermal Hall conductivity of spin-triplet superconductor with time reversal symmetry breaking
Imai Yoshiki, Wakabayashi Katsunori, Sigrist Manfred (2017), Thermal Hall conductivity of spin-triplet superconductor with time reversal symmetry breaking, in Journal of Physics: Conference Series, 807(10), 102006-102006.
Effect of quantum tunneling on spin Hall magnetoresistance
Ok Seulgi, Chen Wei, Sigrist Manfred, Manske Dirk (2017), Effect of quantum tunneling on spin Hall magnetoresistance, in Journal of Physics: Condensed Matter, 29(7), 075802-075802.
Correlation length, universality classes, and scaling laws associated with topological phase transitions
Chen Wei, Legner Markus, Rüegg Andreas, Sigrist Manfred (2017), Correlation length, universality classes, and scaling laws associated with topological phase transitions, in Physical Review B, 95(7), 075116-075116.
Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry
Imai Yoshiki, Wakabayashi Katsunori, Sigrist Manfred (2017), Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry, in Physical Review B, 95(2), 024516-024516.
Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6
Biswas P. K., Legner M., Balakrishnan G., Hatnean M. Ciomaga, Lees M. R., Paul D. McK., Pomjakushina E., Prokscha T., Suter A., Neupert T., Salman Z. (2017), Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6, in Physical Review B, 95(2), 020410-020410.
Thermal Hall Conductivity in a Multiband Chiral p -Wave Superconductor
Imai Yoshiki, Wakabayashi Katsunori, Sigrist Manfred (2016), Thermal Hall Conductivity in a Multiband Chiral p -Wave Superconductor, in Journal of the Physical Society of Japan, 85(11), 115002-115002.
Scaling theory of ${{\mathbb{Z}}_{2}}$ topological invariants
Chen Wei, Sigrist Manfred, Schnyder Andreas P (2016), Scaling theory of ${{\mathbb{Z}}_{2}}$ topological invariants, in Journal of Physics: Condensed Matter, 28(36), 365501-365501.
Cooperon condensation and intravalley pairing states in honeycomb Dirac systems
Tsuchiya Shunji, Goryo Jun, Arahata Emiko, Sigrist Manfred (2016), Cooperon condensation and intravalley pairing states in honeycomb Dirac systems, in Physical Review B, 94(10), 104508-104508.
Spin Hall effect induced spin transfer through an insulator
Chen Wei, Sigrist Manfred, Manske Dirk (2016), Spin Hall effect induced spin transfer through an insulator, in Physical Review B, 94(10), 104412-104412.
Identifying detrimental effects for multiorbital superconductivity: Application to Sr2RuO4
Ramires Aline, Sigrist Manfred (2016), Identifying detrimental effects for multiorbital superconductivity: Application to Sr2RuO4, in Physical Review B, 94(10), 104501-104501.
Nodal-chain metals
Bzdušek Tomáš, Wu QuanSheng, Rüegg Andreas, Sigrist Manfred, Soluyanov Alexey A. (2016), Nodal-chain metals, in Nature, 538(7623), 75-78.
Leggett modes and multiband superconductivity in Sr2RuO4
Huang Wen, Scaffidi Thomas, Sigrist Manfred, Kallin Catherine (2016), Leggett modes and multiband superconductivity in Sr2RuO4, in Physical Review B, 94(6), 064508-064508.
Scaling theory of topological phase transitions
Chen Wei (2016), Scaling theory of topological phase transitions, in Journal of Physics: Condensed Matter, 28(5), 055601-055601.
Thermal Hall conductivity and topological transition in a chiral p -wave superconductor for Sr2RuO4
Imai Yoshiki, Wakabayashi Katsunori, Sigrist Manfred (2016), Thermal Hall conductivity and topological transition in a chiral p -wave superconductor for Sr2RuO4, in Physical Review B, 93(2), 024510-024510.
Minimal Model of Spin-Transfer Torque and Spin Pumping Caused by the Spin Hall Effect
Chen Wei, Sigrist Manfred, Sinova Jairo, Manske Dirk (2015), Minimal Model of Spin-Transfer Torque and Spin Pumping Caused by the Spin Hall Effect, in Physical Review Letters, 115(21), 217203-217203.

Collaboration

Group / person Country
Types of collaboration
Prof. Klaus Ensslin Switzerland (Europe)
- Publication
Dr. Michel Kenzelmann Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Jean-Marc Triscone Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Andrew Mackenzie Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Ying Liu United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Pietro Gambardella Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Titus Neupert Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Daniel F. Agterberg United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Yuji Matsuda Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Alexey Soluyanov Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Youichi Yanase Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Yoshiteru Maeno Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Yoshiki Imai Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Norio Kawakami Japan (Asia)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Seminar at the University of Bratislava Individual talk Deviation from the Fermi-Liquid Transport Behavior in the Vicinity of a Van Hove Singularity 29.03.2019 Bratislava, Slovakia Herman Frantisek;
3rd International Symposium of the SFB/TR 49 on ”Novel states in correlated condensed matter from model systems to real materials” Talk given at a conference Cooper pairing in materials with reduced symmetry - Fitness test for superconducting phases 18.03.2019 Bad Neuenahr, Germany Sigrist Manfred;
8th MaNEP Winterschool 2019 Talk given at a conference Unconventional Superconductivity 13.01.2019 Saas Fee, Switzerland Sigrist Manfred;
Trends in Theory of Correlated Materials (TTCM 2018) Poster Superconducting gap anisotropy induced by topological singularities - thermodynamic properties 08.10.2018 Geneva, Switzerland Zinkl Bastian;
Trends in Theory of Correlated Materials (TTCM 2018) Poster Braiding Majorana corner modes in two-dimensional second-order topological superconductors 08.10.2018 Geneva, Switzerland Pahomi Eugen-Tudor;
Trends in the Theory of Correlated Materials 2018 Talk given at a conference Non-Fermi Liquid Behavior in the Vicinity of a Van Hove Singularity 07.10.2018 Geneva, Switzerland Herman Frantisek;
Swiss Workshop on Materials with Novel Electronic Properties 2018 Poster Transport properties in the vicinity of a Lifshitz transition caused by uniaxial pressure in Sr_2RuO_4 29.08.2018 Les Diablerets, Switzerland Herman Frantisek;
Materials and Mechanisms of Superconductivity and High-Temperature Superconductors, M2S-HTSC Talk given at a conference Fit to superconduct? - Cooper pairing in materials with reduced symmetry 19.08.2018 Beijing, China Sigrist Manfred;
Workshop ”Oxide Superspin 2017” Talk given at a conference Aspects of Symmetry in Unconventional Superconductors 25.11.2017 Kyoto University, Kyoto, Japan Sigrist Manfred;
MaNEP Workshop on Topological Quantum Phenomena Talk given at a conference Spontaneous surface flux pattern in chiral p-wave superconductors — revisited 20.11.2017 University of Zurich, Switzerland Etter Sarah;
Nishinomiya-Yukawa memorial Workshop on ”Novel Quantum States in Condensed Matter 2017” Talk given at a conference Features of edge states and domain walls in chiral superconductors 23.10.2017 Yukawa Institute, Kyoto, Japan Sigrist Manfred;
Annual Meeting of the Swiss Physical Society Talk given at a conference Symmetry and Topology of unconventional superconductors 21.08.2017 Geneva, Switzerland Sigrist Manfred;
Seminar at Kyoto University Individual talk Chiral Superconductors - A closer look on some intriguing features 31.07.2017 Kyoto, Japan Sigrist Manfred;
Seminar at RIKEN Wako Individual talk Chiral Superconductors - A closer look on some intriguing features 28.07.2017 Wako, Japan Sigrist Manfred;
German physical society sping meeting 2017 Talk given at a conference Renormalization Group Approach to Topological Phase Transitions 20.03.2017 Dresden, Germany Chen Wei;
Colloquium at CEA Grenoble Individual talk Unconventional Superconductivity - A matter of symmetry and topology 17.03.2017 Grenoble, France Sigrist Manfred;
Spin coherence, condensation, and superfluidity Talk given at a conference Dissipationless Multiferroic Magnonics 13.02.2017 Moorea, French Polynesia Chen Wei;
Symposium for the 70th birthday of Hilbert von Loehneysen Talk given at a conference Twin boundaries in unconventional superconductors 23.11.2016 Karlsruhe Institute of Technology, Karlsruhe, Germany Sigrist Manfred;
Workshop ”WEH628 - Trends in Mesoscopic Superconductivity” Talk given at a conference Features of topological superconductivity in eutectic samples of Sr2RuO4 14.11.2016 Bad Honnef, Germany Sigrist Manfred;
Seminar at the Max Planck Institute for Solid State Research Stuttgart Individual talk Phenomena at surfaces, interfaces and junctions in chiral p-wave superconductors 08.11.2016 Stuttgart, Germany Etter Sarah;
TOPO MAT Meeting 2016 Talk given at a conference Chiral superconductors - A closer look on some intriguing features 19.09.2016 Max Planck Institute for Solid State Research Stuttgart, Germany Sigrist Manfred;
Annual Meeting of the Swiss Physical Society 2016 Talk given at a conference Edge current in chiral p-wave superconductors – revisited 22.08.2016 USI Lugano, Switzerland Etter Sarah;
Interfacial spintronics and spin waves Talk given at a conference Tunneling Spectroscopy Using Spin Voltage 18.07.2016 St. Sebastian, Spain Chen Wei;
Swiss Workshop on Materials with Novel Electronic Properties 2016 Talk given at a conference Surface-state spin textures and mirror Chern numbers in topological Kondo insulators 06.07.2016 Les Diablerets, Switzerland Legner Markus;
Swiss Workshop on Materials with Novel Electronic Properties 2016 Poster Tunneling Spectroscopy Using Spin Voltage 06.07.2016 Les Diablerets, Switzerland Chen Wei;
Swiss Workshop on Materials with Novel Electronic Properties 2016 Poster The elusive edge current of chiral p-wave superconductors 06.07.2016 Les Diablerets, Switzerland Etter Sarah;
Spectroscopies in Novel Superconductors Poster The elusive edge current of chiral p-wave superconductors 20.06.2016 Ludwigsburg, Germany Etter Sarah;
Top-Spin 2 Talk given at a conference Tunneling Spectroscopy Using Spin Voltage 26.05.2016 Groningen, Netherlands Chen Wei;
Trends in Theory of Correlated Materials 2016 Poster The elusive edge current of chiral p-wave superconductors 22.05.2016 Paul Scherrer Institute Villigen, Switzerland Etter Sarah;
Trends in the Theory of Correlated Materials 2016 Poster Surface-state spin textures and mirror Chern numbers in a topological Kondo insulator 22.05.2016 Paul Scherrer Institute Villigen, Switzerland Legner Markus;
Trends in Theory of Correlated Materials 2016 Talk given at a conference Scaling Theory for Topological Phase Transitions 22.04.2016 Paul Scherrer Institute Villigen, Switzerland Chen Wei;
International Workshop on Sr2RuO4: Unresolved Issues and Prospects Talk given at a conference Twists and surprises of a ”textbook” unconventional superconductor 05.12.2015 Shanghai, China Sigrist Manfred;
International Workshop on Sr2RuO4: Unresolved Issues and Prospects, Shanghai Center for Complex Physics Talk given at a conference Chiral domains and domain walls 05.12.2015 Shanghai, China Sigrist Manfred;
Colloquium at the Jiao Tong University Shanghai Individual talk Unconventional Superconductivity - A matter of Symmetry and Topology 04.12.2015 Shanghai, China Sigrist Manfred;


Awards

Title Year
Outstanding Paper Award of the Physical Society of Japan for the Article "Locally Non-centrosymmetric Superconductivity in Multilayer Systems", J. Phys. Soc. Jpn. 81, 034702 (2012), together with Daisuke Maruyama and Youichi Yanase 2019

Associated projects

Number Title Start Funding scheme
144248 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.10.2012 Project funding (Div. I-III)
131809 Research in Theoretical, Mathematical and Computational Physics 01.10.2010 Project funding (Div. I-III)
184739 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.04.2019 Project funding (Div. I-III)
126459 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.10.2009 Project funding (Div. I-III)
144248 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.10.2012 Project funding (Div. I-III)

Abstract

States of electrons are determined by band structure and mutual correlation. Both features are responsible for an immense variety of states of matter. In our project we address questions and problems which have recently arisen in experimental and theoretical context, through the discovery of new materials and new theoretical concepts to understand of new electronic phases. This project concentrates on superconductivity which incorporates these aspects in an intriguing way.A focus will be put on superconducting phases with topological properties. Several su- perconductors are considered strong candidates for the realization of topological supercon- ductivity, such as Sr2RuO4 for chiral p-wave and SrPtAs and URu2Si2 for different forms of chiral d-wave pairing, encompassing rather distinct materials classes (transition metal oxides, pnictides and heavy Fermion materials). The connection between topological and experimentally relevant properties as well as their microscopic / macroscopic theoretical description will be tackled, including also the special class of non-centrosymmetric super- conductors with their intricate connection of orbital and spin degrees of freedom. New insights can be obtained by artificially structuring conventional and unconventional super- conductors, e.g. by superlattice structures or focussed-ion-beam (FIB) treatment to obtain specially tailored systems to probe superconducting order parameters under special condi- tions. In this way the internal structure of superconducting condensates may be revealed and superconducting phases may be modified in some specific (predictable) directions. This form of order parameter manipulation is a further goal of this project. Much of the work will evolve in close contact with several world-leading experimental groups in Switzerland and internationally.
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