Enhancement of the superconducting transition temperature by Re doping in Weyl semimetal MoTe2
Manasi Mandal, Sourav Marik, K. P. Sajilesh, Arushi, Deepak Singh, Jayita Chakraborty, Nirmal Ganguli, R. P. Singh
DOI 10.1103/PhysRevMaterials.2.094201 · Physical Review Materials
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Abstract
This work presents the emergence of superconductivity in Re-substituted topological Weyl semimetal MoTe2. Re substitution for Mo sites leads to a sizable enhancement in the superconducting transition temperature (Tc). A record high Tc at ambient pressure in a 1T′−MoTe2 (room-temperature structure) related sample is observed for the Mo0.7Re0.3Te2 composition (Tc=4.1K; in comparison, MoTe2 shows a Tc of 0.1 K). The experimental and theoretical studies indicate that Re substitution is doping electrons and facilitates the emergence of superconductivity by enhancing the electron-phonon coupling and density of states at the Fermi level. Our findings, therefore, open a new way to further manipulate and enhance the superconducting state together with the topological states in two-dimensional van der Waals materials.
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. | 0.1 | Pressure unresolved | unknown |
| Mo0.7Re0.3Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.1 | Pressure unresolved | onset |
| Mo0.7Re0.3Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.1 | Pressure unresolved | unknown |
| Mo0.9Re0.1Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.2 | Pressure unresolved | unknown |
| Mo0.95Re0.05Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure unresolved | onset |
| MoTe2-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure unresolved | unknown |
| MoTe2-xSx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure unresolved | unknown |
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