Quantum phase transitions and the role of impurity-substrate hybridization in Yu-Shiba-Rusinov states
Entity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
Nature ResearchDate
2020-12-01Citation
10.1038/s42005-020-00469-0
Communications Physics 3.1 (2020): 199
ISSN
2399-3650DOI
10.1038/s42005-020-00469-0Funded by
This work was funded in part by the ERC Consolidator Grant AbsoluteSpin (grant no. 681164) and by the Center for Integrated Quantum Science and Technology (IQST). J.A. acknowledges funding from the DFG under grant number AN336/11-1. A.L.Y. and J.C.C. acknowledge funding from the Spanish MINECO (grant no. FIS2017-84057-P and FIS2017-84860-R), from the “María de Maeztu” Programme for Units of Excellence in R&D (MDM-2014-0377).Project
info:eu-repo/grantAgreement/EC/H2020/681164/EU//ABSOLUTESPIN; Gobierno de España. FIS2017-84057-P; Gobierno de España. FIS2017-84860-REditor's Version
https://doi.org/10.1038/s42005-020-00469-0Subjects
Josephson junctions; Superconductivity; Quantum dots; FísicaRights
© 2020 The Author(s)Abstract
Spin-dependent scattering from magnetic impurities inside a superconductor gives rise to Yu-Shiba-Rusinov (YSR) states within the superconducting gap. They can be modeled by the largely equivalent Kondo or Anderson impurity models. The role of the magnetic and nonmagnetic properties of the impurity in relation to the coupling to the substrate is still under debate. Here, we use a scanning tunneling microscope to make a quantitative connection between the energy of a YSR state and the impurity-substrate hybridization. We corroborate the impurity substrate coupling as a key energy scale for surface derived YSR states using the Anderson impurity model. By combining experimental data from YSR state spectra and additional conductance measurements, we can determine on which side of the quantum phase transition the system resides. We thus provide a crucial step towards a more quantitative understanding of the crucial role of impurity substrate coupling utilizing the Anderson model
Files in this item
Google Scholar:Huang, Haonan
-
Drost, Robert
-
Senkpiel, Jacob
-
Padurariu, Ciprian
-
Kubala, Björn
-
Levy-Yeyati Mizrahi, Alfredo
-
Cuevas Rodríguez, Juan Carlos
-
Ankerhold, Joachim
-
Kern, Klaus
-
Ast, Christian R.
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.