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Excitation Gap in the Normal State of Underdoped Bi 2 Sr 2 CaCu 2 O 8+ δ
Abstract
Angle-resolved photoemission experiments reveal evidence of an energy gap in the normal state excitation spectrum of the cuprate superconductor Bi 2 Sr 2 CaCu 2 O 8+ δ . This gap exists only in underdoped samples and closes around the doping level at which the superconducting transition temperature T c is a maximum. The momentum dependence and magnitude of the gap closely resemble those of the d x 2 − y 2 gap observed in the superconducting state. This observation is consistent with results from several other experimental techniques, which also indicate the presence of a gap in the normal state. Some possible theoretical explanations for this effect are reviewed.
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Cites
Hüfner, S. (1995) · Springer Series in Solid-State Sciences · doi:10.1007/978-3-662-03150-6 · Cited by 854
LDA energy bands, low-energy hamiltonians, t′, t″, t⊥ (k), and J⊥
Andersen, O. K., Liechtenstein, A. I., Jepsen, O., & Paulsen, F. (1995) · Journal of Physics and Chemistry of Solids · doi:10.1016/0022-3697(95)00269-3 · Cited by 759
Cited by
Angle-resolved photoemission studies of the cuprate superconductors
Damascelli, A., Hussain, Z., & Shen, Z.-X. (2003) · Reviews of Modern Physics · doi:10.1103/revmodphys.75.473 · Cited by 3,775
Self-citationThe pseudogap in high-temperature superconductors: an experimental survey
Timusk, T., & Statt, B. (1999) · Reports on Progress in Physics · doi:10.1088/0034-4885/62/1/002 · Cited by 2,121
Colloquium : Theory of intertwined orders in high temperature superconductors
Fradkin, E., Kivelson, S. A., & Tranquada, J. M. (2015) · Reviews of Modern Physics · doi:10.1103/revmodphys.87.457 · Cited by 1,070
A Unified Theory Based on SO (5) Symmetry of Superconductivity and Antiferromagnetism
Zhang, S.-C. (1997) · Science · doi:10.1126/science.275.5303.1089 · Cited by 819
Electrodynamics of high-Tcsuperconductors
Basov, D. N., & Timusk, T. (2005) · Reviews of Modern Physics · doi:10.1103/revmodphys.77.721 · Cited by 788
Metadata
- Authors
- Loeser, A. G., Shen, Z.-X., Dessau, D. S., Marshall, D. S., Park, C. H., Fournier, P., & Kapitulnik, A.
- Venue
- Science
- Published
- 1996-07-19
- Volume
- 273
- Issue
- 5273
- Pages
- 325-329
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2059581111
- Cited by
- 914
- References
- 2
- FWCI
- 61.88
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Excitation Gap in the Normal State of Underdoped Bi 2 Sr 2 CaCu 2 O 8+ δ. https://app.cochat.ai/papers/10.1126/science.273.5273.325
- The paper
- Loeser, A. G., Shen, Z.-X., Dessau, D. S., Marshall, D. S., Park, C. H., Fournier, P., & Kapitulnik, A. (1996). Excitation Gap in the Normal State of Underdoped Bi 2 Sr 2 CaCu 2 O 8+ δ. Science. https://doi.org/10.1126/science.273.5273.325
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