Quantum oscillations and anisotropic magnetoresistance in the quasi-two-dimensional Dirac nodal line superconductor YbSb2
Yuxiang Gao, Kevin Allen, Rose Albu Mustaf, Yichen Zhang, Sanu Mishra, Christopher Lane, Marta Zonno, Sergey Gorovikov, Jian-Xin Zhu, Ming Yi, Emilia Morosan
DOI 10.1103/8jjw-4r71 · Physical Review B
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Abstract
Recent interest in quantum materials has focused on systems exhibiting both superconductivity and nontrivial band topology as material candidates to realize topological or unconventional superconducting states. So far, superconductivity in most topological materials has been identified as type II. In this work, we present magnetotransport studies on the quasi-two-dimensional type I superconductor YbSb2. Combined ab initio density functional theory calculations and quantum oscillation measurements confirm that YbSb2 is a Dirac nodal line semimetal in the normal state. The complex Fermi-surface morphology is evidenced by the nonmonotonic angular dependence of both the quantum oscillation amplitude and the magnetoresistance. Our results establish YbSb2 as a candidate material platform for exploring the interplay between band topology and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YbSb2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure not reported | onset |
| YbSb2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
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