Superconductivity in the topological semimetal YPtBi
N. P. Butch, P. Syers, K. Kirshenbaum, A. P. Hope, J. Paglione
DOI 10.1103/PhysRevB.84.220504 · Physical Review B
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Abstract
The noncentrosymmetric half Heusler compound YPtBi exhibits superconductivity below a critical temperature Tc=0.77 K with a zero-temperature upper critical field Hc2(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 2×1018 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YPtBi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.77 | Pressure not reported | unknown |
| YPtBi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.77 | Pressure not reported | unknown |
| LaPtBi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | Pressure not reported | unknown |
| Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
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