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Yu-Shiba-Rusinov bound states studied by tuning the electron density at the Fermi energy

We studied the nature of Yu-Shiba-Rusinov (YSR) bound states in response to the potential scattering U by tuning the electron density at the Fermi energy. By comparing two systems, Mn-phthalocyanine molecules on Pb(111) and Co atoms on PbSe/Pb(111), we demonstrate that the sign of U can be unambiguo...

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Bibliographic Details
Published in:Physical review. B 2021-06, Vol.103 (21), Article 214509
Main Authors: Song, Sang Yong, Park, Yun Sung, Jeong, Yongchan, Kim, Min-Seok, Kim, Ki-Seok, Seo, Jungpil
Format: Article
Language:English
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Summary:We studied the nature of Yu-Shiba-Rusinov (YSR) bound states in response to the potential scattering U by tuning the electron density at the Fermi energy. By comparing two systems, Mn-phthalocyanine molecules on Pb(111) and Co atoms on PbSe/Pb(111), we demonstrate that the sign of U can be unambiguously determined by varying the electron density at the Fermi energy. We further show that U competes with the exchange interaction JS in the formation of YSR bound states. Our work provides insights into the interactions between magnetic atoms and superconductors at a fundamental level.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.103.214509