Fermi surfaces of the topological semimetal CaSn3 probed through de Haas van Alphen oscillations

Abstract In the search of topological superconductors, nailing down Fermiology normal state is as crucial a prerequisite unraveling superconducting pairing symmetry. particular, number time-reversal-invariant momenta (TRIM) in Brillouin zone enclosed by Fermi surfaces closely linked to class systems, and can experimentally be investigated. We report here detailed study de Haas van Alphen quantum oscillations single crystals semimetal CaSn 3 with torque magnetometry high magnetic fields up 35 T. conjunction density functional theory based calculations, observed frequencies indicate that enclose an odd TRIM, satisfying one proposed criteria realize superconductivity. Nonzero Berry phases extracted from also support nontrivial nature .