Strongly enhanced superconductivity in doped monolayer MoS2 by strain
Shuming Zeng, Yinchang Zhao, Geng Li, Jun Ni
DOI 10.1103/PhysRevB.94.024501 · Physical Review B
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Abstract
The effects of strain on the stability, electron-phonon coupling, and superconductivity of doped monolayer MoS2 are investigated systematically using first-principles calculations. We find that most of the electron-phonon coupling in doped monolayer MoS2 is attributed to the in-plane vibrations of Mo atoms, which can be further tuned by strain. By applying biaxial compressive strain, we find a large enhancement in the superconducting transition temperature (Tc) and we obtain a Tc of 22K at the optimal hole doping concentration, while the electron-phonon coupling of electron-doped structure is reduced due to the direct-indirect band-gap insulator transition. Our results reveal that the Fermi surface nesting-driven mechanism is mainly responsible for phonon softening and superconductivity in monolayer MoS2, suggesting that doping combined with strain is efficient at tuning electron-phonon coupling and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MoS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | unknown |
| MoS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
| MoS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17 | Pressure not reported | unknown |
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