Unusual magnetic-field dependence of the electrothermal conductivity in the mixed state of cuprate superconductors
J. A. Clayhold, Y. Y. Xue, C. W. Chu, J. N. Eckstein, I. Bozovic
DOI 10.1103/PhysRevB.53.8681 · Physical Review B
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Abstract
In the mixed state of a superconductor, the electrothermal conductivity, P, which measures the electrical current density produced by a thermal gradient, is supposed to be independent of both the magnetic field and the details of the vortex motion. Measurements of the thermopower and resistivity in YBa2Cu3O7−δ, Bi2Sr2CaCu2O8+δ, and Tl2Ba2CaCu2O8+δ show an unusual, sharp structure in P at low field. In Bi2Sr2CaCu2O8+δ, the extra contribution is negative, causing a sign change of the thermopower versus applied magnetic field. The possible origins of the low-field anomaly are discussed. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | unknown |
| Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 105 | Pressure not reported | unknown |
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