Quasiparticle on Bogoliubov Fermi Surface and Odd-Frequency Cooper Pair

Quasiparticle on Bogoliubov Fermi Surface and Odd-Frequency Cooper Pair

We discuss a close relationship between a quasiparticle on the Bogoliubov Fermi surface and an odd-frequency Cooper pair in a superconductor in which a Cooper pair consisting of two j = 3/2 electrons forms the pseudospin-quintet even-parity pair potential with breaking time-reversal symmetry. It has...

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Veröffentlicht in:Journal of the Physical Society of Japan 2021-10, Vol.90 (10), p.104708
Hauptverfasser: Kim, Dakyeong, Kobayashi, Shingo, Asano, Yasuhiro
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Sprache:eng
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Chirality
Cooper pairs
Elementary excitations
Fermi surfaces
Lithium
Physicists
Symmetry
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Kobayashi, Shingo
Asano, Yasuhiro
description We discuss a close relationship between a quasiparticle on the Bogoliubov Fermi surface and an odd-frequency Cooper pair in a superconductor in which a Cooper pair consisting of two j = 3/2 electrons forms the pseudospin-quintet even-parity pair potential with breaking time-reversal symmetry. It has been established in a single-band superconductor that a low-energy quasiparticle below the superconducting gap accompanies an odd-frequency Cooper pair. In this paper, we show that an odd-frequency pair characterized by chirality coexists with a quasiparticle on the Bogoliubov Fermi surface. The symmetry of odd-frequency Cooper pairs is analyzed in detail by taking realistic pair potentials into account in a cubic superconductor.
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subjects Chirality
Cooper pairs
Elementary excitations
Fermi surfaces
Lithium
Physicists
Symmetry
title Quasiparticle on Bogoliubov Fermi Surface and Odd-Frequency Cooper Pair
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