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Interplay of Magnetism and Superconductivity in Unconventional Superconductors

Applicant Gavilano Jorge Luis
Number 140345
Funding scheme Project funding (Div. I-III)
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.04.2012 - 31.05.2013
Approved amount 111'124.00
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Keywords (1)

superconductivity, magnetism, neutron scattering

Lay Summary (English)

Lead
Lay summary

The proposed research is a continuation of our long-term project focused on the experimental study of novel materials displaying superconductivity sc and magnetism. From the beginning of the research on sc it was clear that in simple metal superconductors, magnetism had a lethal effect: a small amount of magnetic impurities completely destroy sc. However, in the last three decades this paradigm was increasingly questioned as new materials become available. These new materials are intermetallic alloys containing a lattice of unfilled f-electron shells and show an intriguing interplay of magnetism and superconductivity. Our research focus on the study of particular aspects of this interplay on materials that have come to the spot-light of research during the last five years and is part of the thesis work of two PhD candidates, financed by the SNF.


Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Glassy low-energy spin fluctuations and anisotropy gap in La1.88Sr0.12CuO4
Romer A T, Chang J, Christensen N B, Andersen B M, Lefmann K, Maeler L, Gavilano J L, Straessle S, Gilardi R, Niedermayer Ch, Ronnow H M, Scheidewind A, Link P, Oda M, Ido M, Momono M, Mesot J (2013), Glassy low-energy spin fluctuations and anisotropy gap in La1.88Sr0.12CuO4, in Phys Rev B, 87(14), 14451.
Electric field control of the skyrmion lattice in Cu2OSeO3
White J S, Levatic I, Omrani A A, Egetenmeyer N, Prsa K, Zivkovic I, Gavilano J L, Kohlbrecher J, Bartkowiak M, Berger H, Ronnow H M (2012), Electric field control of the skyrmion lattice in Cu2OSeO3, in J Phys.: Condensed Matter, 24, 432201.
Possible skyrmion-lattice ground state in the B20 chiral-lattice magnet MnGe as seen via small-angle neutron scattering
Kanasawa N, Kim J-H, Inosov D S, White J S, Egetenmeyer N, Gavilano J L, Ishiwata Y, Onose T, Arima T, Keimer B, Tokura Y (2012), Possible skyrmion-lattice ground state in the B20 chiral-lattice magnet MnGe as seen via small-angle neutron scattering, in Physical Review B, 86, 134425.
mu SR investigation of magnetically ordered states in the A-site ordered perovskite manganites RBaMn2O6 (R = Y and La)
Kawasaki Y, Minami T, Izumi M, Kishimoto Y, Ohno T, Sato K H, Koda A, Kadono R, Gavilano J L, Luetkens K, Nakajima T, Ueda Y (2012), mu SR investigation of magnetically ordered states in the A-site ordered perovskite manganites RBaMn2O6 (R = Y and La), in Phys Rev B, 86(12), 125141.
Direct Observation of the Quantum Critical Point in Heavy Fermion CeRhSi3
Egetenmeyer N, Gavilano J L, Maisuradze A, Gerber S, MacLaughlin D E, Seyfarth G, Andreica D, Desilets-Benoit A, Bianchi A D, Baines C, Khasanov R, Fisk Z, Kenzelmann M (2012), Direct Observation of the Quantum Critical Point in Heavy Fermion CeRhSi3, in Phys Rev. Lett, 108(17), 177204.
Spin density wave induced disordering of the vortex lattice in superconducting La2-xSrxCuO4
Chang J, White J S, Laver M, Bowel C J, Brown S P, Holmes A T, Maechler L, Strassle S, Gilardi R, Gerber S, Kurosawa T, Momono N, Oda M, Ido M, Lipscombe O J, Hayden S M, Dewhurst C D, Vavrin R, Gavilano J L, Kohlbrecher J, Forgan E M, Mesot J (2012), Spin density wave induced disordering of the vortex lattice in superconducting La2-xSrxCuO4, in Phys. Rev. B, 85(13), 134520.

Collaboration

Group / person Country
Types of collaboration
Dr. Jonathan Whit, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
J. Chang, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Romain Sibille, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Andrea Bianchi, Phys. Dept., University of Montreal Canada (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Kazimierz Conder, LDM PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
PSI-IOP Workshop 29.07.2012 Zurich Switzerland
SPG Jahrestagung 29.07.2012 Zurich Switzerland


Associated projects

Number Title Start Funding scheme
147071 Superconductivity in Unconventional Metals and its Interplay with Magnetism 01.10.2013 Project funding (Div. I-III)
122054 Interplay of Magnetism and Superconductivity in Unconventional Superconductors 01.04.2009 Project funding (Div. I-III)
122054 Interplay of Magnetism and Superconductivity in Unconventional Superconductors 01.04.2009 Project funding (Div. I-III)

Abstract

We request funding to extend our current SNF program for one year in order to finish the thesis of our two Ph.D. students, Nikola Egetenmeyer and Simon Gerber. Their thesis topic is “Interplay of magnetism and superconductivity in selected unconventional superconductors”. The main experimental techniques of our research are neutron scattering with: triple-axis, small angle scattering, SANS, powder and single-crystal diffraction instruments. In selected cases we, furthermore, perform muon spin rotation, µSR, and angle-resolved photoemission spectroscopy, ARPES, measurements. The experiments are carried out at our institution, the Paul Scherrer Institut, PSI, Switzerland and at the Institut Laue Langevin, ILL, Grenoble, France. For the requested extension year we propose to complete the following projects: (i) Studies of subtle (but we believe important) features of the Q phase of CeCoIn5 by neutron diffraction. (ii) Development and implementation at PSI of a technique to study the vortex lattice, VL, of unconventional superconductors in an applied electrical current (iii) Study of the superconducting and normal state of Ca3Ir4Sn3, a newly discovered superconductor, by µSR and inelastic neutron scattering. (iv) Study of the VL of selected high-Tc cuprate superconductors using the SANS technique at very high fields, up to 17 T. (v) Study of the superconducting state of Ni doped BaFe2As2 by low- energy muons. For the above-mentioned experiments we have obtained high-quality single crystals, synthesized at PSI and abroad.
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