Apex-oxygen-atom tunneling as source of anomalous low-temperature specific heat in high-Tc superconductors
Marco Zoli
DOI 10.1103/PhysRevB.44.7163 · Physical Review B
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Abstract
A model is proposed in which the quantum tunneling of the apex oxygen atom is coupled to the quasiparticle excitations of the superconducting state. A path-integral formulation allows one to renormalize the coupling constant as a function of temperature. It is shown that such a model can account for the anomalous low-temperature specific heat observed in high-Tc YBa2Cu3O7−δ superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ 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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