Quasiparticle interference and spectral function of the Ute2 superconductive surface band

Journal article

We compute the (0-11) surface spectral function, the surface density of states (DOS), and the quasiparticle interference (QPI) patterns, both in the normal state and superconducting state of UTe₂. We consider all possible nonchiral and chiral order parameters (OPs) that could, in principle, describe the superconductivity in this compound. We describe the formation of surface states whose maximum intensity energy depends on the nature of the pairing. We also study the QPI patterns resulting from the scattering of these surface states. Along the lines of [Nat. Phys. 21, 1555 (2025)1745-247310.1038/s41567-025-03000-w], we show that the main feature distinguishing between various OPs is a QPI peak that is only observed experimentally in the superconducting state. The energy dispersion and the stability of this peak is consistent among the nonchiral OPs only with a B3u pairing. Moreover, B3u is the only nonchiral pairing that shows a peak at zero energy in the DOS, consistent with the experimental observations.

Authors: Crépieux, A; Pangburn, E; Wang, S; Zhussupbekov, K; Carroll, JP

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Physical Society
• Journal: Physical Review B
• Volume: 112
• Issue: 21
• Article number: 214509
• Publication date: 2025-12-10
• Acceptance date: 2025-11-14
• DOI: 10.1103/3kcp-w4ny
• EISSN: 2469-9969
• ISSN: 2469-9950
• Language: English