Influence of magnetic field on tunneling conductance in normal metal/ dx2-y2-wave superconductor junctions

Influences of magnetic field on tunneling conductance spectra in normal metal/dx2-y2-wave superconductor junctions are studied on the basis of the quasiclassical Green's function method where the spatial dependence of the pair potential is determined self-consistently. Focuses are set on the fi...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2002, Vol.71 (1), p.271-277
Main Authors: TANAKA, Yukio, TSUCHIURA, Hiroki, TANUMA, Yasunari, KASHIWAYA, Satoshi
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Proximity effects, weak links, tunneling phenomena, and Josephson effects
Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions
Superconductivity
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Summary:Influences of magnetic field on tunneling conductance spectra in normal metal/dx2-y2-wave superconductor junctions are studied on the basis of the quasiclassical Green's function method where the spatial dependence of the pair potential is determined self-consistently. Focuses are set on the field response of the zero-bias conductance peaks (ZBCP). For the detection of the splitting of the ZBCP due to broken time-reversal symmetry states, we found the presence of a critical value for the magnetic field strength in contrast to previous theories. The critical field HC is almost proportional to the width of ZBCP in the absence of field and equivalently to the transparency of the junctions. The present result may explain the origin for the inconsistency of the magnetic field responses in several experiments.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.71.271