Twin-boundary dynamics and properties of high-Tc superconductors
B. Horovitz, G. R. Barsch, J. A. Krumhansl
DOI 10.1103/PhysRevB.36.8895 · Physical Review B
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Abstract
We present evidence for collective twin-boundary oscillations in the high-Tc oxide superconductors and propose that their coupling with electrons enhances Tc. These special modes, which we call "dyadons," have a highly anisotropic and low-frequency spectrum, causing the specific heat to change from a T3 temperature dependence to T2 at lower temperatures, consistent with anomalies below ∼12 K in doped La2CuO4 and in YBa2Cu3O7. The low-frequency dyadons also account for the extended linear temperature dependence of the normal-state resistivity. Due to the unusual anisotropy of both dyadon and electron spectra, vertex corrections generate a strong electron-dyadon coupling at lower temperatures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| La1.85Ba0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| La1.8Sr0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.72 | Pressure not reported | unknown |
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