Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A49: Topology and Chiral Superconductivity
8:00 AM–11:00 AM,
Monday, March 15, 2021
Sponsoring Unit: DCMP
Chair: Johnpierre Paglione, University of Maryland, College Park
Abstract: A49.00001 : A Theory from First-principles on Magnetism and Superconductivity in UTe2
8:00 AM–8:36 AM
Next, we provide and analyze a periodic Anderson model for UTe2 . The 24-band tight-binding model reproduces the band structure obtained from a GGA+U calculation. The Coulomb interaction of f-electrons enhances Ising ferromagnetic fluctuation along the a-axis consistent with experiments and stabilizes the spin-triplet superconductivity of either B3u or Au symmetry. When effects of pressure are considered in hopping integrals, the magnetic fluctuation changes to an antiferromagnetic one, and accordingly, the spin-singlet superconductivity of Ag symmetry is stabilized. Based on the results, we propose multiple superconducting phases under pressures and magnetic fields. Interestingly, a mixed-parity superconducting state with spontaneous parity violation is predicted.
 Jun Ishizuka, Shuntaro Sumita, Akito Daido, Youichi Yanase, Phys. Rev. Lett. 123, 217001 (2019).
 Jun Ishizuka and Youichi Yanase, arXiv:2008.01945.
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