Time-Reversal Symmetry and the Structure of Superconducting Order Parameter of Nearly Ferromagnetic Spin-Triplet Superconductor UTe2

Abstract

The space-group approach to the wavefunction of a Cooper pair is extended to Shubnikov groups of type III and applied to newly discovered nearly ferromagnetic superconductor UTe2. A nonunitary triplet SOP (superconducting order parameter), manifested experimentally, was obtained for Shubnikov group m'm'm . The nodal structure of triplet nonunitary SOP is investigated and it was shown that in the case of Shubnikov III symmetry nodal structure of ESP (equal spin pairing) state is in some cases unstable, i.e. changes when a complex phase winding is added. The irreducible corepresentations of a Cooper pair wave function corresponding to m'm'm symmetry and to all experimental data for UTe2 are identified.

11 pages, 2 figures

References in corpus (7)

• Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2
• Insulator-metal transition and topological superconductivity in UTe2 from a first-principles calculation
• Point Node Gap Structure of Spin-Triplet Superconductor UTe2
• Superconducting Properties of Heavy Fermion UTe${}_2$ Revealed by ${}^{125}$Te-Nuclear Magnetic Resonance
• Quasi-two-dimensional Fermi surfaces and unitary spin-triplet pairing in the heavy fermion superconductor UTe${}_2$
• Topological Blount's theorem of odd-parity superconductors
• Refined symmetry indicators for topological superconductors in all space groups

Cited by in corpus (6)

• Periodic Anderson model for magnetism and superconductivity in UTe2
• Topological band and superconductivity in UTe${}_2$
• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Nonunitary Superconductivity in Complex Quantum Materials
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$