Spin and phonon contribution to the superconductivity in La2−xSrxCuO4
| Autor: | T. Muroi, Y. Takayanagi, Shunji Sugai, N. Hayamizu |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Phonon General Chemistry Condensed Matter Physics Symmetry (physics) symbols.namesake Condensed Matter::Superconductivity Phase (matter) Pairing symbols Condensed Matter::Strongly Correlated Electrons General Materials Science Anisotropy Spin (physics) Raman spectroscopy |
| Zdroj: | Journal of Physics and Chemistry of Solids. 69:3058-3063 |
| ISSN: | 0022-3697 |
| Popis: | Anisotropy of high-energy spin excitations and low-energy conductive electronic excitations in Raman spectra can be interpreted, if quantum spin fluctuation is weak. The low-energy states at (π/2, π/2) in the underdoped phase are composed of insulating states induced by the insulator–metal transition and the conductive states induced by electron–phonon coupling. The superconducting states are created in the latter states and the pairing symmetry is s or d(xy). On the other hand, the electronic states at (π, 0) in the overdoped phase are electron–spin coupled states and the pairing symmetry is d(x2−y2). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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