Exchange interaction for the triplet superconductor UTe2

Chih Kai Yang*, Chi Hsuan Lee

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

Abstract

UTe2 is one triplet superconductor that defies conventional relation between ferromagnetism and superconductivity. Our search for a theoretical explanation starts with one spin-triplet state of two electrons and construct a two-particle exchange interaction that favors the formation of Cooper pairs under the configuration. A modified application of the Bardeen–Cooper–Schrieffer (BCS) theory using parameters derived from ab-initio density functional calculations for electrons and phonons enables us to derive the critical temperature of 1.64 K and an average superconducting gap of 0.25 meV at 0 K. We extend the investigation further into the superconductivity under pressure, showing how Tc and the gap of UTe2 change under compression in ways that are consistent with the results of experiment.

Original languageEnglish
Article number13995
Pages (from-to)13995
JournalScientific Reports
Volume13
Issue number1
DOIs
StatePublished - 26 08 2023
Externally publishedYes

Bibliographical note

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