Theory of hole superconductivity

S. Das; N. C. Das

doi:10.1103/PhysRevB.46.6451

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Theory of hole superconductivity

S. Das, N. C. Das

DOI 10.1103/PhysRevB.46.6451 · Physical Review B

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Abstract

The role of the recently proposed hole-pairing interaction as a mechanism of superconductivity in high-Tc oxide superconductors is analyzed. A tight-binding Hamiltonian is considered and a generalized expression for the momenum-dependent energy-gap function is derived on the basis of BCS-type pairing in Hubbard-like subbands. The energy states in the subbands are obtained, with hole propagation in a matrix of anions in a plane. The variation of Tc versus the charge-carrier concentration n for different strengths of pairing interaction is studied. A possible connection between this and similar behavior in superconductors of transition-metal alloys is discussed.

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