Fermi Surface and Quasiparticle Excitations of OverdopedTl2Ba2CuO6+δ
| Autor: | Walter Hardy, Ilya Elfimov, Andrea Damascelli, Ruixing Liang, Ming Shi, M. Platé, D. A. Bonn, Luc Patthey, J. D. F. Mottershead, M. Falub, S. G. Chiuzbaian, Darren C. Peets |
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| Rok vydání: | 2005 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Photoemission spectroscopy Binding energy General Physics and Astronomy Angle-resolved photoemission spectroscopy Fermi surface Electronic structure 01 natural sciences 010305 fluids & plasmas Condensed Matter::Superconductivity 0103 physical sciences Quasiparticle Condensed Matter::Strongly Correlated Electrons Cuprate Atomic physics 010306 general physics |
| Zdroj: | Physical Review Letters. 95 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.95.077001 |
| Popis: | The high-${T}_{c}$ superconductor ${\mathrm{Tl}}_{2}{\mathrm{Ba}}_{2}{\mathrm{CuO}}_{6+\ensuremath{\delta}}$ is studied by angle-resolved photoemission spectroscopy. For a very overdoped ${T}_{c}=30\text{ }\text{ }\mathrm{K}$ sample, the Fermi surface consists of a single large hole pocket centered at $(\ensuremath{\pi},\ensuremath{\pi})$ and is approaching a topological transition. Although a superconducting gap with ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ symmetry is tentatively identified, the quasiparticle evolution with momentum and binding energy exhibits a marked departure from the behavior observed in under and optimally doped cuprates. The relevance of these findings to scattering, many-body, and quantum-critical phenomena is discussed. |
| Databáze: | OpenAIRE |
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