Details

Autor(en) / Beteiligte

• Perrin, Vivien
• Santos, Flávio L. N.
• Ménard, Gerbold C.
• Brun, Christophe
• Cren, Tristan
• Civelli, Marcello
• Simon, Pascal

Titel

Unveiling Odd-Frequency Pairing around a Magnetic Impurity in a Superconductor

Ist Teil von

• Physical review letters, 2020-09, Vol.125 (11), p.1-117003, Article 117003

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2020

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We study the unconventional superconducting correlations caused by a single isolated magnetic impurity in a conventional s-wave superconductor. Because of the local breaking of time-reversal symmetry, the impurity induces unconventional superconductivity, which is even in both space and spin variables but odd under time inversion. We derive an exact proportionality relation between the even-frequency component of the local electron density of states and the imaginary part of the odd-frequency local pairing function. By applying this relation to scanning tunneling microscopy spectra taken on top of magnetic impurities immersed in a Pb/Si(111) monolayer, we show experimental evidence of the occurrence of the odd-frequency pairing in these systems and explicitly extract its superconducting function from the data.