Electron-phonon interaction in two dimensions: The case for strong coupling in high-Tc superconductors
Daniel C. Mattis
DOI 10.1103/PhysRevB.36.3933 · Physical Review B
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Abstract
A particular model interaction between electrons and acoustic phonons is found to cause electrons to become weakly "self-trapped" for an arbitrary filling factor in d=2, but not in d=1 nor, for different reasons, in d≥3. To the extent that electron kinetic energy is reduced in d=2, the electronic interactions become proportionally more effective. Among phonon-mediated interactions we identify a static anisotropic interaction, compatible with observed ordering of oxygen vacancies along privileged axes in YBa2Cu3O7−x, while other mechanisms encourage electron pairing and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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