Superconducting pairing symmetry in MoTe2
M. M. Piva, L. O. Kutelak, R. Borth, Y. Liu, C. Petrovic, R. D. dos Reis, M. Nicklas
DOI 10.1103/PhysRevMaterials.7.L111801 · Physical Review Materials
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Abstract
Topological superconductors have long been sought for their potential use in quantum computing. The type-II Weyl semimetal MoTe2 is an obvious candidate, exhibiting a superconducting state below 500 mK at ambient pressure, but the question remains whether the pairing is conventional s++ or topological s+−. The application of external pressure favors the superconducting state in MoTe2 and suppresses the structural transition from 1T′ to Td. The competition between the two structures leads to a mixed phase that strongly enhances the disorder present in the system, remarkably without affecting the superconducting transition temperature, in contrast to the expectation of s+− pairing superconductivity. Our thorough analysis of the electrical and Hall resistivities as a function of pressure yields the most accurate temperature-pressure phase diagram available to date for MoTe2 and a detailed view of the relationship between disorder and superconductivity, supporting a conventional s++ pairing symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MoTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure unresolved | unknown |
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