Lattice model for the broken-time-reversal-symmetry pairing state near a surface of d-wave superconductors

Jian-Xin Zhu; B. Friedman; C. S. Ting

doi:10.1103/PhysRevB.59.3353

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Lattice model for the broken-time-reversal-symmetry pairing state near a surface of d-wave superconductors

Jian-Xin Zhu, B. Friedman, C. S. Ting

DOI 10.1103/PhysRevB.59.3353 · Physical Review B

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Abstract

Based on an extended Hubbard model, the spatial variation of the order parameter is calculated self-consistently near the surface of d-wave superconductors. It is shown a d+is order parameter can be induced near a {110} surface, leading to splitting of the zero-energy peak in the surface local density of states and the generation of a spontaneous surface supercurrent. This splitting can be diminished by the increase of orthorhombicity, on-site repulsive interaction, or temperature. Our results give a microscopic explanation for the surface broken-time-reversal-symmetry pairing state.

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.	—	Pressure not reported	unknown
Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown