Quantum oscillations in the noncentrosymmetric superconductor and topological nodal-line semimetal PbTaSe2
Xitong Xu, Zhibo Kang, Tay-Rong Chang, Hsin Lin, Guang Bian, Zhujun Yuan, Zhe Qu, Jinglei Zhang, Shuang Jia
DOI 10.1103/PhysRevB.99.104516 · Physical Review B
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Abstract
We observed quantum oscillations in thermoelectric and magnetic torque signals in noncentrosymmetric superconductor PbTaSe2. 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 PbTaSe2, 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PbTaSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.76 | Pressure not reported | onset |
| PbTaSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | unknown |
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