Pressure-tuned superconductivity in the Dirac semimetal PdTe
Xiangming Kong, Zhaolong Liu, Xiangqi Liu, Chunqiang Xu, Zhenhai Yu, Jing Wang, Baomin Wang, Xiaofeng Xu, Yanfeng Guo, Rui Zhang, Xiaofan Yang, Shiyan Li
DOI 10.1103/PhysRevB.109.104506 · Physical Review B
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Abstract
We report an unusual evolution of superconductivity (SC) in the three-dimensional Dirac semimetal PdTe with increasing pressure up to ∼50 GPa. The compressed PdTe exhibits a sudden reversal in the superconducting transition temperature Tc, from an initial decrease with pressure to an increase above a critical pressure Pc≈ 15 GPa, showing a V-shaped feature composed of SC-I and SC-II phases due to a structural phase transition through Pc. Subsequently, the Tc goes into a plateau around 2.5 K when the pressure is higher than ∼32 GPa. In addition, we find the variations of carrier concentrations and mobilities also manifest a similar trend on the pressure response as the Tc, and the normal-state electronic properties change from the electron-dominated single-band model to the two-carrier model after the structural phase transition, implying the close correlation between electronic properties and two SC phases. Our findings establish the SC of PdTe is highly tunable under varying pressures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PdTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure unresolved | onset |
| PdTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure unresolved | onset |
| PdTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.1 | 0.8 GPa | onset |
| PdTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | 15 GPa | onset |
| PdTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | 32.1 GPa | onset |
| PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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