Anomalous pressure dependence of the superconducting transition temperature in TlNi2Se2−xSx
S. K. Goh, H. C. Chang, P. Reiss, P. L. Alireza, Y. W. Cheung, S. Y. Lau, Hangdong Wang, Qianhui Mao, Jinhu Yang, Minghu Fang, F. M. Grosche, M. L. Sutherland
DOI 10.1103/PhysRevB.90.201105 · Physical Review B
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Abstract
We report the pressure dependence of the superconducting transition temperature Tc in TlNi2Se2−xSx detected via the ac susceptibility method. The pressure-temperature phase diagram constructed for TlNi2Se2, TlNi2S2, and TlNi2SeS exhibits two unexpected features: (a) a sudden collapse of the superconducting state at moderate pressure for all three compositions and (b) a dome-shaped pressure dependence of Tc for TlNi2SeS. These results point to the nontrivial role of S substitution and its subtle interplay with applied pressure, as well as interesting superconducting properties of the TlNi2Se2−xSx system.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| TlNi2Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.5 | Pressure unresolved | onset |
| TlNi2Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | unknown |
| TlNi2SeS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure not reported | onset |
| TlNi2S2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
| BaNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | unknown |
| SrNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | unknown |
| SrNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.6 | Pressure not reported | unknown |
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