Periodic Anderson model for magnetism and superconductivity in UTe2

Jun Ishizuka; Youichi Yanase

doi:10.1103/PhysRevB.103.094504

← Back to search

Periodic Anderson model for magnetism and superconductivity in UTe2

Jun Ishizuka, Youichi Yanase

DOI 10.1103/PhysRevB.103.094504 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We provide and analyze a periodic Anderson model for studying magnetism and superconductivity in UTe2, a recently discovered candidate for a topological spin-triplet superconductor. The 24-band tight-binding model reproduces the band structure obtained from a DFT+U calculation consistent with an angle-resolved photoemission spectroscopy. The Coulomb interaction of f-electrons enhances Ising ferromagnetic fluctuation along the a-axis and stabilizes spin-triplet superconductivity of either B3u or Au symmetry. When effects of pressure are taken into account in hopping integrals, the magnetic fluctuation changes to an antiferromagnetic one, and accordingly spin-singlet superconductivity of Ag symmetry is stabilized. Based on the results, we propose pressure-temperature and magnetic field-temperature phase diagrams revealing multiple superconducting phases as well as an antiferromagnetic phase. In particular, a mixed-parity superconducting state with spontaneous inversion symmetry breaking is predicted.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.6	Pressure not reported	onset
UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3	1.2 GPa	onset