Kavli Affiliate: J. C. Seamus Davis
| First 5 Authors: Adeline Crépieux, Emile Pangburn, Shuqiu Wang, Kuanysh Zhussupbekov, Joseph P. Carroll
| Summary:
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 (SC) state of UTe$_2$. We consider all
possible non-chiral 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 study also the QPI patterns resulting from the scattering of these
surface states. 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 non-chiral OPs only with a $B_{3u}$ pairing. Moreover, $B_{3u}$ is the only
non-chiral pairing that shows a peak at zero energy in the DOS, consistent with
the experimental observations.
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