Inelastic-neutron-scattering study of the electron-phonon interaction in a superconducting La1.85Sr0.15CuO4 single crystal
Henry Chou, K. Yamada, J. D. Axe, S. M. Shapiro, G. Shirane, Isao Tanaka, Kenichi Yamane, Hironao Kojima
DOI 10.1103/PhysRevB.42.4272 · Physical Review B
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Abstract
Linewidths of some transverse acoustic phonons have been studied as a function of temperature on a superconducting single-crystal sample of La1.85Sr0.15CuO4 (Tc=33 K) with the goal of measuring the electron-phonon interaction. The phonons studied have energies in the range ω∼6.0–9.5 meV and observed full widths at half-maximum in the range 2γobs∼0.25–0.5 meV. No temperature-dependent changes were observed in any of the linewidths near the transition temperature. This null result is consistent with a low electronic density of states at the Fermi surface, and an electron-phonon coupling parameter λ that is not unusually high compared with conventional superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
| Nb3Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18.3 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
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