期刊
PHYSICAL REVIEW B
卷 84, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.220504
关键词
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资金
- NSF-MRSEC [DMR-0520471]
- DARPA-MTO [N66001-09-c-2067]
- AFOSR-MURI [FA9550-09-1-0603]
The noncentrosymmetric half Heusler compound YPtBi exhibits superconductivity below a critical temperature T(c) = 0.77 K with a zero-temperature upper critical field H(c2)(0) = 1.5 T. Magnetoresistance and Hall measurements support theoretical predictions that this material is a topologically nontrivial semimetal having a surprisingly low positive charge-carrier density of 2 x 10(18) cm(-3). Unconventional linear magnetoresistance and beating in Shubnikov-de Haas oscillations point to spin-orbit split Fermi surfaces. The sensitivity of magnetoresistance to surface roughness suggests a possible contribution from surface states. The combination of noncentrosymmetry and strong spin-orbit coupling in YPtBi presents a promising platform for the investigation of topological superconductivity.
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