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Magnetic Field-Induced "Mirage" Gap in an Ising Superconductor
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4639632
Author(s) Tang, Gaomin; Bruder, Christoph; Belzig, Wolfgang
Author(s) at UniBasel Bruder, Christoph
Tang, Gaomin
Year 2021
Title Magnetic Field-Induced "Mirage" Gap in an Ising Superconductor
Journal Physical Review Letters
Volume 126
Number 23
Pages / Article-Number 237001
Abstract Superconductivity is commonly destroyed by a magnetic field due to orbital or Zeeman-induced pair breaking. Surprisingly, the spin-valley locking in a two-dimensional superconductor with spin-orbit interaction makes the superconducting state resilient to large magnetic fields. We investigate the spectral properties of such an Ising superconductor in a magnetic field taking into account disorder. The interplay of the in-plane magnetic field and the Ising spin-orbit coupling leads to noncollinear effective fields. We find that the emerging singlet and triplet pairing correlations manifest themselves in the occurrence of "mirage" gaps: at (high) energies of the order of the spin-orbit coupling strength, a gaplike structure in the spectrum emerges that mirrors the main superconducting gap. We show that these mirage gaps are signatures of the equal-spin triplet finite-energy pairing correlations and due to their odd parity are sensitive to intervalley scattering.
Publisher American Physical Society
ISSN/ISBN 0031-9007 ; 1079-7114
URL https://arxiv.org/pdf/2011.07080.pdf
edoc-URL https://edoc.unibas.ch/87299/
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevLett.126.237001
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/34170185
ISI-Number 000661898600007
Document type (ISI) Journal Article
 
   

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