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Free keywords:
Quantum computers, Tellurium compounds, Topology, Ambient pressures, External pressures, Hall resistivity, Mixed phase, Pairing symmetries, Quantum Computing, Structural transitions, Superconducting pairing, Superconducting state, Type II, Superconducting transition temperature
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. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
