Tunable electron-phonon coupling superconductivity in platinum diselenide
Cai Cheng, Jia-Tao Sun, Min Liu, Xiang-Rong Chen, Sheng Meng
DOI 10.1103/PhysRevMaterials.1.074804 · Physical Review Materials
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Abstract
The superconducting property of platinum diselenide (PtSe2), being a type-II Dirac semimetal, doped with electron and hole carriers has been investigated by first-principles calculations. It is found that the superconducting transition temperature Tc of pristine PtSe2 is very low (≤0.002 K), making it infeasible as a practical superconductor. The electron doping is an effective way to increases the Tc of PtSe2 to 2.15 K at 0.5e− per unit cell. We further find that the mechanism of superconducting transition is the acoustic branch vibration mode softening rather than the Fermi surface nesting. Our results provide an important clue to increase superconducting temperature in the heavy transition-metal dichalcogenides and shed light on searching for new superconducting topological semimetals.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PtSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.002 | Pressure not reported | unknown |
| PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.7 | Pressure not reported | unknown |
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