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Theory for tunneling spectroscopy of anisotropic superconductors
Abstract
A theory for the tunneling spectroscopy of a normal-metal--insulator--anisotropic-superconductor (N-I-S) junction is presented. In anisotropic superconductors, the effective pair potential felt by the quasiparticles depends on their wave vectors in contrast to the case of isotropic s-wave superconductors. By introducing the effect into the Blonder-Tinkham-Klapwidjk formula, a conductance formula for N-I-S junctions is obtained. It is shown that the conductance spectra are a function not only of the amplitudes of pair potentials but also of their phases. Tunneling conductance spectra calculated for various symmetries strongly depend on the relation between the tunneling direction and crystalline axes. In some crystalline angle regions of d-wave superconductors, a zero-energy peak in the conductance spectra is calculated. This conductance peak reflects the existence of anomalous bound states around the insulator--anisotropic-superconductor interface. The relation between the tunneling conductance spectra and the local density of states of superconductors is discussed. \textcopyright{} 1996 The American Physical Society.
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WALSH, T. (1992) · International Journal of Modern Physics B · doi:10.1142/s0217979292000098 · Cited by 62
Cited by
Tunnelling effects on surface bound states in unconventional superconductors
Kashiwaya, S., & Tanaka, Y. (2000) · Reports on Progress in Physics · doi:10.1088/0034-4885/63/10/202 · Cited by 989
Self-citationWei, J. Y. T., Yeh, N.-C., Garrigus, D. F., & Strasik, M. (1998) · Physical Review Letters · doi:10.1103/physrevlett.81.2542 · Cited by 386
Theory of Josephson effects in anisotropic superconductors
Tanaka, Y., & Kashiwaya, S. (1997) · Physical Review B · doi:10.1103/physrevb.56.892 · Cited by 383
Self-citationMidgap edge states and pairing symmetry of quasi-one-dimensional organic superconductors
Sengupta, K., Žutić, I., Kwon, H.-J., Yakovenko, V. M., & Das Sarma, S. (2001) · Physical Review B · doi:10.1103/physrevb.63.144531 · Cited by 301
Metadata
- Authors
- Kashiwaya, S., Tanaka, Y., Koyanagi, M., & Kajimura, K.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 1996-02-01
- Volume
- 53
- Issue
- 5
- Pages
- 2667-2676
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W2045394412
- Cited by
- 373
- References
- 1
- FWCI
- 16.38
- Type
- journal article
- Language
- en
- Open access
- closed
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