Elastic and inelastic quasiparticle tunneling between anisotropic superconductors

Yung-mau Nie; L. Coffey

doi:10.1103/PhysRevB.59.11982

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Elastic and inelastic quasiparticle tunneling between anisotropic superconductors

Yung-mau Nie, L. Coffey

DOI 10.1103/PhysRevB.59.11982 · Physical Review B

T1

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Abstract

Numerical results are presented for quasiparticle tunneling across a superconductor-insulator-superconductor (SIS) tunnel junction due to elastic and inelastic tunneling, with the latter mediated by spin fluctuations and phonons. SIS tunnel junctions with dx2−y2, extended s+dx2−y2, and extended s+idx2−y2 superconducting order-parameter symmetries are investigated. The dependence of the tunneling conductance (dI/dV) on temperature, directional tunneling matrix element, and a tight-binding band structure appropriate for high-temperature superconductors is studied. The results are compared with recent point-contact tunneling and scanning tunneling microscope measurements of SIS tunneling dI/dV curves for optimal and overdoped Bi2Sr2CaCu2O8.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown