Pressure coefficient of the superconducting transition temperature within the van Hove scenario

Sujit Sarkar; S. Basu; A. N. Das

doi:10.1103/PhysRevB.52.12545

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Pressure coefficient of the superconducting transition temperature within the van Hove scenario

Sujit Sarkar, S. Basu, A. N. Das

DOI 10.1103/PhysRevB.52.12545 · Physical Review B

T1

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Abstract

Pressure coefficient (β) of the superconducting transition temperature is studied within the van Hove scenario considering a realistic density of states for two-dimensional systems and taking into account the variations of the Debye frequency, carrier concentration (n), hopping integral, and the effective attractive interaction of the system with pressure (p). β is large for underdoped systems and it decreases with doping. In the overdoped region β may be positive or negative depending on the value of ∂n/∂p. The experimental data points of the hole-doped cuprates are found to fit reasonably well with the theoretical results.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown