Quantum oscillations in the non-centrosymmetric superconductor and topological nodal-line semimetal PbTaSe${}_2$

Abstract

We observed quantum oscillations in thermoelectric and magnetic torque signals in non-centrosymmetric superconductor PbTaSe${}_2$. One oscillatory frequency stems from the orbits formed by magnetic breakdown, while others are from two-dimensional-like Fermi surfaces near the topological nodal rings. Our comprehensive understanding of the Fermi surface topology of PbTaSe${}_2$, including nailing down the Fermi level and detecting the Berry phases near the nodal rings, is crucial for searching plausible topological superconductivity in its bulk and surface states.

References in corpus (5)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Phases of Noncentrosymmetric Superconductors: Edge States, Majorana Fermions, and the Non-Abelian Statistics
• Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
• Topological spin-current in non-centrosymmetric superconductors
• Electron scattering in tantalum monoarsenide

Cited by in corpus (9)

• Crystal growth and quantum oscillations in the topological chiral semimetal CoSi
• Kramers nodal lines and Weyl fermions in SmAlSi
• Evidence of topological nodal lines and surface states in the centrosymmetric superconductor SnTaS2
• Three-dimensional topological semimetal phase in layered TaNiTe5 probed by de Haas-van Alphen effect
• Critical point for Bose-Einstein condensation of excitons in graphite
• Anomalous Nernst Effect in Nonmagnetic Nodal Line Semimetal PbTaSe${}_2$
• Unusual upper critical fields of the topological nodal-line semimetal candidate Sn${}_x$NbSe${}_{2-\delta }$
• Fully gapped superconductivity without sign reversal in the topological superconductor PbTaSe${}_2$
• Fragile topology in nodal-line semimetal superconductors