Pressure Induced Effects on the Fermi Surface of Superconducting 2H−NbSe2
H. Suderow, V. G. Tissen, J. P. Brison, J. L. Martínez, S. Vieira
DOI 10.1103/PhysRevLett.95.117006 · Physical Review Letters
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Abstract
The pressure dependence of the critical temperature Tc and upper critical field Hc2(T) has been measured up to 19 GPa in the layered superconducting material 2H−NbSe2. Tc(P) has a maximum at 10.5 GPa, well above the pressure for the suppression of the charge density wave (CDW) order. Using an effective two-band model to fit Hc2(T), we obtain the pressure dependence of the anisotropy in the electron-phonon coupling and Fermi velocities, which reveals the peculiar interplay between CDW order, Fermi surface complexity, and superconductivity in this system.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YNi2B2C 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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