Possible unconventional two-band superconductivity in MoTe2
Jiawei Luo, Yanan Li, Jiawei Zhang, Haoran Ji, He Wang, Jun-Yi Shan, Canxun Zhang, Cong Cai, Jun Liu, Yong Wang, Yan Zhang, Jian Wang
DOI 10.1103/PhysRevB.102.064502 · Physical Review B
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Abstract
The coexistence of the type-II Weyl semimetal phase and superconductivity in the layered transition-metal dichalcogenide MoTe2 is of great interest as it is considered a promising candidate for an intrinsic topological superconductor. However, the ultralow superconducting critical temperature (Tc) of ∼0.1 K limits the exploration of the intrinsic superconducting properties. Here the superconductivity in MoTe2 is investigated by systematic ultralow temperature transport measurements with standard four-electrode configuration, together with the hard point-contact (PC) technique which can enhance the Tc and detect the in situ spectroscopic information of the pairing symmetry. The temperature dependence of the superconducting critical field from transport measurements and the two-step double conductance peaks from the PC spectra measurements both suggest the two-band superconductivity in MoTe2. Together with the occasional observation of zero-bias conductance peaks in the spectra, our results suggest the unconventional two-band superconductivity with potential s+− pairing in MoTe2.
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. | 0.154 | Pressure not reported | onset |
| MoTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.1 | Pressure not reported | zero_resistance |
| MoTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.2 | 11.7 GPa | unknown |
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