Notes on multiple superconducting phases in UTe2 ---Third transition---
Abstract
A three-component Ginzburg-Landau theory for a triplet pairing is developed to understand the observed multiple phases in a new superconductor UTe2 under pressure. Near the critical pressure P cr=0.2GPa where all components are perfectly degenerate the three successive superconducting transitions are predicted to occur. The p-wave pairing symmetry realized in UTe2 is characterized by non-unitarity and chirality with point nodes, thus time reversal symmetry spontaneously broken.
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