Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T42: Topological Superconductivity: Theory
11:30 AM–2:30 PM,
Thursday, March 9, 2023
Room: Room 318
Sponsoring
Unit:
DMP
Chair: Sheng-Jie Huang, Max Planck Institute for the Physics of Complex Systems
Abstract: T42.00009 : A quantitative theory of Yu-Shiba-Rusinov states of magnetic atomic structures on different superconducting substrates*
1:30 PM–1:42 PM
Presenter:
Bendegúz Nyári
(Budapest University of Technology and Economics)
Authors:
Bendegúz Nyári
(Budapest University of Technology and Economics)
Andras Laszloffy
(Wigner Research Centre for Physics)
Kyungwha Park
(Virginia Tech)
Nóra Kucska
(Wigner Research Centre for Physics)
Laszlo Szunyogh
(Budapest University of Technology and Economics)
Balazs Ujfalussy
(Wigner Research Centre for Physics)
We performed calculations for different s-wave superconductors (Nb, Ta, Pb), covered by different overlayers (Au, Ir, Pt, Bi) hosting different magnetic impurities (Mn, Fe, Co, Cr). The local density of states (LDOS) is calculated for each system within the superconducting gap, and the formation of the Yu--Shiba--Rusinov states is observed. The YSR spectrum is analyzed with respect to the LDOS in the normal state and the effect of spin-orbit coupling is studied. In several systems, we found signatures of spin-triplet superconductivity via the coupling between the electron and hole spin-down channels induced by large spin-orbit interaction, which we further verified in terms of the calculated spin-triplet order parameter.
*Financial support was provided by the National Research, Development, and Innovation (NRDI) Office of Hungary under Project Nos. K131938 and K142652 and within the Quantum Information National Laboratory of Hungary. B.Ny. acknowledge the support by the ÚNKP-22-4 New National Excellence Program of the Ministry for Innovation and Technology. We acknowledge KIFÜ for awarding us access to resource based in Hungary.
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