Phase diagram and excitations of a Shiba molecule

N. Y. Yao, C. P. Moca, I. Weymann, J. D. Sau, M. D. Lukin, E. A. Demler, G. Zaránd

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We analyze the phase diagram associated with a pair of magnetic impurities trapped in a superconducting host. The natural interplay between Kondo screening, superconductivity, and exchange interactions leads to a rich array of competing phases, whose transitions are characterized by discontinuous changes of the total spin. Our analysis is based on a combination of numerical renormalization group techniques as well as semiclassical analytics. In addition to the expected screened and unscreened phases, we observe a new molecular doublet phase where the impurity spins are only partially screened by a single extended quasiparticle. Direct signatures of the various Shiba molecule states can be observed via radio-frequency spectroscopy.

Original languageEnglish
Article number241108
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number24
DOIs
Publication statusPublished - Dec 9 2014

Fingerprint

Radiofrequency spectroscopy
Phase diagrams
phase diagrams
Impurities
impurities
Molecules
Exchange interactions
Superconductivity
excitation
molecules
radio frequencies
Screening
screening
superconductivity
Phase transitions
signatures
spectroscopy
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Phase diagram and excitations of a Shiba molecule. / Yao, N. Y.; Moca, C. P.; Weymann, I.; Sau, J. D.; Lukin, M. D.; Demler, E. A.; Zaránd, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 24, 241108, 09.12.2014.

Research output: Contribution to journalArticle

Yao, N. Y. ; Moca, C. P. ; Weymann, I. ; Sau, J. D. ; Lukin, M. D. ; Demler, E. A. ; Zaránd, G. / Phase diagram and excitations of a Shiba molecule. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 90, No. 24.
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