Observation of odd-parity superconductivity in UTe2

Abstract

Symmetry properties of the order parameter are among the most fundamental characteristics of a superconductor. The pairing symmetry of recently discovered heavy fermion superconductor UTe2 featuring an exceedingly large upper critical field has attracted a great deal of attention. Even though it is widely believed that UTe2 possesses an odd-parity, spin-triplet pairing symmetry, direct evidence for it is lacking, especially at zero or low magnetic fields. We report here the selection-rule results of Josephson coupling between In, an s-wave superconductor, and UTe2. The orientation dependence of the Josephson coupling suggests very strongly that UTe2 possess an odd-parity pairing state of B_1u in zero magnetic fields. We also report the formation of Andreev surface bound states on the (1-10) surface of UTe2.

16 pages, 4 figures, 2 tables

References in corpus (16)

• The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
• Unconventional Superconductivity in Heavy Fermion UTe2
• Unconventional Superconductivity in UTe2
• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• Periodic Anderson model for magnetism and superconductivity in UTe2
• First Observation of de Haas-van Alphen Effect and Fermi Surfaces in Unconventional Superconductor UTe2
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Superconducting order parameter in UTe${}_2$ determined by Knight shift measurement
• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Single-Component Superconductivity in UTe${}_2$ at Ambient Pressure
• Revealing a 3D Fermi Surface Pocket and Electron-Hole Tunneling in UTe${}_2$ with Quantum Oscillations
• Symmetry of magnetic correlations in spin-triplet superconductor UTe2
• Quantum interference between quasi-2D Fermi surface sheets in UTe2
• Superconductivity in Uranium Compounds
• Observation of odd-parity superconductivity in UTe2
• Symmetry properties of superconducting order parameter in Sr${}_2$RuO${}_4$

Cited by in corpus (5)

• Signatures of Chiral Superconductivity in Rhombohedral Graphene
• Observation of odd-parity superconductivity in UTe2
• Two-dimensional flat band on the (011) surface of UTe${}_2$: Implication for STM measurements with a superconducting tip
• Revealing isotropic abundant low-energy excitations in UTe${}_2$ through complex microwave surface impedance
• Raman response of collective modes in multicomponent superconductors