Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111392
Title: Correlation of Yu-Shiba-Rusinov States and Kondo Resonances in Artificial Spin Arrays on an s-Wave Superconductor
Authors: Kamlapure, A.
Cornils, L.
Žitko, R.
Valentyuk, M.
Mozara, R.
Pradhan, S.
Fransson, J.
Lichtenstein, A. I.
Wiebe, J.
Wiesendanger, R.
Issue Date: 2021
Publisher: American Chemical Society
American Chemical Society (ACS)
Citation: Correlation of Yu-Shiba-Rusinov States and Kondo Resonances in Artificial Spin Arrays on an s-Wave Superconductor / A. Kamlapure, L. Cornils, R. Žitko et al. // Nano Letters. — 2021. — Vol. 21. — Iss. 16. — P. 6748-6755.
Abstract: Mutually interacting magnetic atoms coupled to a superconductor have gained enormous interest due to their potential for the realization of topological superconductivity. Individual magnetic impurities produce states within the superconducting energy gap known as Yu-Shiba-Rusinov (YSR) states. Here, using the tip of a scanning tunneling microscope, we artificially craft spin arrays consisting of an Fe adatom interacting with an assembly of interstitial Fe atoms (IFA) on a superconducting oxygen-reconstructed Ta(100) surface and show that the magnetic interaction between the adatom and the IFA assembly can be tuned by adjusting the number of IFAs in the assembly. The YSR state experiences a characteristic crossover in its energetic position and particle-hole spectral weight asymmetry when the Kondo resonance shows spectral depletion around the Fermi energy. By the help of slave-boson mean-field theory (SBMFT) and numerical renormalization group (NRG) calculations we associate the crossover with the transition from decoupled Kondo singlets to an antiferromagnetic ground state of the Fe adatom spin and the IFA assembly effective spin. © 2021 The Authors. Published by American Chemical Society.
Keywords: ARTIFICIAL SPIN ARRAYS
ATOM MANIPULATION
KONDO RESONANCE
SCANNING TUNNELING SPECTROSCOPY
YU-SHIBA-RUSINOV STATES
ADATOMS
GROUND STATE
IRON METALLOGRAPHY
MAGNETISM
MEAN FIELD THEORY
SHEAR WAVES
STATISTICAL MECHANICS
SUPERCONDUCTING MATERIALS
TANTALUM METALLOGRAPHY
ANTIFERROMAGNETIC GROUND STATE
ENERGETIC POSITION
KONDO RESONANCES
MAGNETIC IMPURITY
MAGNETIC INTERACTIONS
NUMERICAL RENORMALIZATION GROUPS
SPECTRAL WEIGHT
SUPERCONDUCTING ENERGY GAP
IRON
URI: http://hdl.handle.net/10995/111392
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85113485221
PURE ID: 23690087
ISSN: 1530-6984
metadata.dc.description.sponsorship: The authors thank Markus Ternes for fruitful discussions. This work was supported by the European Research Council Advanced Grant ADMIRE (Project 786020). R.W. and J.W. acknowledge funding by the Cluster of Excellence “Advanced Imaging of Matter” (EXC 2056, Project 390715994) as well as by the SFB 925-B9 “Light induced dynamics and control of correlated quantum systems” of the Deutsche Forschungsgemeinschaft (DFG). R.Ž. acknowledges support by the Slovenian Research Agency (ARRS) under Program P1-0044. M.V. and R.M. acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG) through Projects SFB668-A3 and -A1 and from the European Union’s Horizon 2020 research and innovation program under Grant Agreement 696656—GrapheneCore1. The work of M.V. was additionally funded through 2019 Equal Opportunity Fund of University of Hamburg. The DFT computations were performed with resources provided by the North-German Supercomputing Alliance (HLRN). S.P. and J.F thank Stiftelsen Olle Engqvist Byggmästare and Vetenskapsrådet for financial support.
CORDIS project card: H2020: 696656
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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