Quasiparticle transport below Tc in the cuprate superconductors
F. Gollnik, R. P. Huebener
DOI 10.1103/PhysRevB.57.7495 · Physical Review B
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Abstract
The interpretation of experimental data on the Nernst and Seebeck effects in the mixed state of a type-II superconductor requires a careful treatment of the temperature-dependent electrothermal conductivity Sn(T)/ρn(T) below Tc (Sn=Seebeckcoefficient, ρn=resistivity). For the cuprate superconductors such as YBa2Cu3O7−δ, a simple extrapolation from the normal-state behavior above Tc is inadequate and can lead to erroneous results, due to the opening of the superconducting energy gap and its effect on the temperature dependence of the quasiparticle scattering rate. In particular, the value of the thermal Hall angle of vortex motion depends sensitively on the correct treatment of the electrothermal conductivity below Tc. Taking experimental data for YBa2Cu3O7−δ films as an example, we show that the thermal Hall angle of vortex motion obtained from the data attains the expected small value only if the opening of the energy gap below Tc is taken into account.
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 |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8x 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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