Anharmonicity-induced multiphonon processes in high-temperature superconductors
A. Bussmann-Holder, A. R. Bishop
DOI 10.1103/PhysRevB.44.2853 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Electron–two-phonon interactions are considered on the basis of an extended BCS-type Hamiltonian. An equation for the superconducting transition temperature Tc and the energy gap 2Δ0 is derived in the weak-coupling limit. Instead of a Debye frequency a reduced optic-acoustic mode frequency, together with a coupled effective electron-phonon interaction, determines the magnitude of Tc. This leads to a distinctly different isotope effect from BCS, which is compared with data on La2−xSrxCuO4. The energy gap is predicted to be anisotropic and 2Δ0/kTc to be compound dependent.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
Similar papers
Spontaneous superconductivity and optical properties of high-Tc cuprates
similarity 0.96M. N. Chernodub
Source status unknown — claims are unverified
Tunneling spectra of unconventional quasi-two-dimensional superconductors
similarity 0.96L. Pisani et al.
Source status unknown — claims are unverified
Thermal conductivity across the phase diagram of cuprates: Low-energy quasiparticles and doping dependence of the superconducting gap
similarity 0.95Mike Sutherland et al.
Source status unknown — claims are unverified
Dependence of the transition temperature on deviations from stoichiometry in the cuprate superconductors
similarity 0.95Vinay Ambegaokar et al.
Source status unknown — claims are unverified
Phase diagram of underdoped cuprate superconductors: Effects of Cooper-pair phase fluctuations
similarity 0.95C. Timm et al.
Source status unknown — claims are unverified
Structural and superconducting properties of La2−xSrxCuO4 as a function of Sr content
similarity 0.95P. G. Radaelli et al.
Source status unknown — claims are unverified