Effect of uniaxial pressure on the superconducting transition in YBa2Cu3O7

Raju P. Gupta; Michèle Gupta

doi:10.1103/PhysRevB.50.9615

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Effect of uniaxial pressure on the superconducting transition in YBa2Cu3O7

Raju P. Gupta, Michèle Gupta

DOI 10.1103/PhysRevB.50.9615 · Physical Review B

T1

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Abstract

The changes in the hole carrier concentrations in YBa2Cu3O7 are calculated for uniaxial compressions. We find that while a compression along the a axis enhances the hole density, the one along the b axis results in an almost equal decrease. Due to this cancellation, the pressure dependence of Tc under a hydrostatic pressure is essentially the same as for a uniaxial stress along the c axis. A qualitative discussion is also given of the strikingly different behavior in YBa2Cu4O8 which is attributed to the chain-chain interaction in this compound.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown