Anomalously large gap anisotropy in thea-bplane ofBi2Sr2CaCu2O8+δ
| Autor: | P. H. Dickinson, Barrett Wells, Daniel S. Marshall, C. H. Park, J. DiCarlo, Aharon Kapitulnik, W. E. Spicer, A. J. Arko, Zhi-Xun Shen, T. Loeser, Daniel Dessau, Sebastian Doniach, D. M. King, L. W. Lombardo |
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| Rok vydání: | 1993 |
| Předmět: |
chemistry.chemical_classification
Physics Superconductivity High-temperature superconductivity Statistics::Applications Condensed matter physics Photoemission spectroscopy General Physics and Astronomy Order (ring theory) Context (language use) law.invention chemistry law Condensed Matter::Superconductivity Anisotropy Inorganic compound Order of magnitude |
| Zdroj: | Physical Review Letters. 70:1553-1556 |
| ISSN: | 0031-9007 |
| DOI: | 10.1103/physrevlett.70.1553 |
| Popis: | Superconducting gap anisotropy at least an order of magnitude larger than that of the conventional superconductors has been observed in the a-b plane of ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{CaCu}}_{2}$${\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ in angle-resolved photoemission spectroscopy. For samples with ${\mathit{T}}_{\mathit{c}}$ of 88 K, the gap size reaches a maximum of approximately 20 meV along the Cu-O bond direction, and a minimum of much smaller or vanishing magnitude 45\ifmmode^\circ\else\textdegree\fi{} away. The experimental data are discussed within the context of various theoretical models. In particular, a detailed comparison with what is expected from a superconductor with a ${\mathit{d}}_{\mathit{x}}^{2}$-${\mathit{y}}^{2}$ order parameter is carried out, yielding a consistent picture. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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