Quantum critical point and superconducting dome in the pressure phase diagram of o-TaS3
M. Monteverde, J. Lorenzana, P. Monceau, M. Núñez-Regueiro
DOI 10.1103/PhysRevB.88.180504 · Physical Review B
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Abstract
We measure the electrical resistance of o-TaS3 between 1 and 300 K under pressures up to 20 GPa. We observe a gradual decrease of the charge density wave transition temperature TCDW with increasing pressure P following a mean field quantum fluctuation power law TCDW=215K[(PC−P)/PC]γ with a quantum critical point at a pressure PC=11.5GPa and γ≈0.5. Around the quantum critical point (QCP) we observe a superconducting dome with a maximum superconducting transition temperature Tc=3.1K. Such dome is similar to superconducting domes around other types of order suggesting that the QCP is directly responsible for the enhancement of superconductivity through a universal mechanism still not well understood.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| TaS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.1 | 11.5 GPa | unknown |
| TaS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.3 | 8 GPa | onset |
| NbSe3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (TaS4)2I 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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