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Midgap surface states as a novel signature fordxa2-xb2-wave superconductivity
Abstract
It is shown that a sizable areal density of midgap states exists on a {110} surface of a ${\mathit{d}}_{\mathit{x}\mathit{a}}^{2}$-${\mathit{x}}_{\mathit{b}}^{2}$-wave superconductor, which can either have vacuum or an insulator at the surface, or be separated from vacuum or an insulator by a clean, size-quantized, normal metal overlayer. These ``midgap'' states have many observable consequences---some of which are briefly discussed here---which can be used as a clear signature to distinguish between d-wave and anisotropic s-wave superconductors.
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Citations
Cites
WALSH, T. (1992) · International Journal of Modern Physics B · doi:10.1142/s0217979292000098 · Cited by 62
Cited by
Weyl and Dirac semimetals in three-dimensional solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.015001 · Cited by 4,528
“…to studying and realizing topological superconductors, with a full gap in the bulk and gapless modes at the edge, there is of course extensive history of work on nodal superconductors and superfluids, where the energy gap closes at points or lines in the BZ (Hu, 1994; Leggett, 1975; Volovik, 2003).”
BackgroundKuroki, K., Onari, S., Arita, R., Usui, H., Tanaka, Y., Kontani, H., & Aoki, H. (2008) · Physical Review Letters · doi:10.1103/physrevlett.101.087004 · Cited by 1,649
Topological Origin of Zero-Energy Edge States in Particle-Hole Symmetric Systems
Ryu, S., & Hatsugai, Y. (2002) · Physical Review Letters · doi:10.1103/physrevlett.89.077002 · Cited by 703
Flat bands in topological media
Heikkilä, T. T., Kopnin, N. B., & Volovik, G. E. (2011) · JETP Letters · doi:10.1134/s0021364011150045 · Cited by 329
Topological surface states in nodal superconductors
Schnyder, A. P., & Brydon, P. M. R. (2015) · Journal of Physics: Condensed Matter · doi:10.1088/0953-8984/27/24/243201 · Cited by 176
Metadata
- Authors
- Hu, C.-R.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1994-03-07
- Volume
- 72
- Issue
- 10
- Pages
- 1526-1529
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W2290163007
- Cited by
- 1,068
- References
- 1
- FWCI
- 18.49
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hu, C.-R. (1994). Midgap surface states as a novel signature fordxa2-xb2-wave superconductivity. Physical Review Letters. https://doi.org/10.1103/physrevlett.72.1526
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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