Tunneling conductance in normal metal - high $T_C$ cuprate junctions in the presence of magnetic field

Abstract

The magnetic field responses of the zero-bias conductance peak (ZBCP) in tunneling spectra of high $T_C$ cuprate junctions are studied theoretically. Our calculation is based on the lattice Green's function method and takes the realistic electronic structure of the high $T_C$ cuprate into account. In marked contrast to previous works, it is shown that the critical magnetic field strength $H_C$ exists for the splittings of the ZBCP's to be discernible. $H_C$ is almost proportional to the product of the magnitude of pair potential, transmissivity of the junction, and the inverse of the Fermi velocity parallel to the interface (1/$v_{Fy}$). The calculated $H_C$'s for the hole-doped superconductors are higher than those for electron-doped ones because of relatively large magnitude of pair potential and the small magnitude of $v_{Fy}$ originating from peculiar shape of the Fermi surface.

5 pages, 6 figures, using jpsj2.cls

References in corpus (4)

• Tunneling conductance of normal metal / $d_{x^2-y^2}$-wave superconductor junctions in the presence of broken time reversal symmetry states near interfaces
• Correlation of tunneling spectra with surface nano-morphology and doping in thin YBa2Cu3O7-delta films
• Influence of impurity scattering on tunneling conductance in normal metal- d -wave superconductor junctions
• Thickness independence of field induced time reversal symmetry breaking in Y/sub1 Ba/sub2 Cu/sub3 O/sub7-delta thin films

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• Influence of impurity-scattering on tunneling conductance in d-wave superconductors with broken time reversal symmetry