27 research outputs found
Unconventional superconducting pairing in a B20 Kramers Weyl semimetal
Topological superconductors present an ideal platform for exploring
nontrivial superconductivity and realizing Majorana boundary modes in
materials. However, finding a single-phase topological material with nontrivial
superconducting states is a challenge. Here, we predict nontrivial
superconductivity in the pristine chiral metal RhGe with a transition
temperature of 5.8 K. Chiral symmetries in RhGe enforce multifold Weyl fermions
at high-symmetry momentum points and spin-polarized Fermi arc states that span
the whole surface Brillouin zone. These bulk and surface chiral states support
multiple type-II van Hove singularities that enhance superconductivity in RhGe.
Our detailed analysis of superconducting pairing symmetries involving Chiral
Fermi pockets in RhGe, indicates the presence of nontrivial superconducting
pairing. Our study establishes RhGe as a promising candidate material for
hosting mixed-parity pairing and topological superconductivity.Comment: 7 pages, 4 figure