Local density of states of quasiparticles near the interface of nonuniform {ital d}-wave superconductors

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.9371· OSTI ID:280198

Tanaka, Y ^[1]; Kashiwaya, S ^[2]

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1. Graduate School of Science and Technology and Department of Physics, Faculty of Science, Niigata University, Ikarashi, Niigata 950-21 (Japan)
2. Electrotechnical Laboratory, Tsukuba, Ibaraki 305 (Japan)

The local density of states of quasiparticle (LDOS) near the interface of {ital d}-wave superconductors is investigated for various situations based on the Green{close_quote}s-function method of nonuniform superconductors. In the case of normal-metal{endash}insulator{endash}{ital d}-wave-superconductor junction, the LDOS near the interface of the superconductor strongly depends on the angle between the normal to the interface and the crystalline axes of {ital d}-wave superconductor, on the thickness and on the height of the insulating barrier. In the case of {ital d}-wave-superconductor{endash}insulator{endash}{ital d}-wave-superconductor junction, bound states are formed at the interfaces of superconductors. The energy levels of bound states which include several limiting cases are explicitly obtained. The LDOS near the interface of the superconductor is strongly influenced by the bound states and it depends not only on the angle between the crystalline axes and the normal to the interface but also on the macroscopic phase difference between two superconductors. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 280198
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
D WAVES
ENERGY-LEVEL DENSITY
GREEN FUNCTION
INTERFACES
JOSEPHSON JUNCTIONS
QUASI PARTICLES
SUPERCONDUCTIVITY