Mixed-state magnetoresistance in organic superconductors κ–(BEDT-TTF)2Cu(NCS)2
F. Zuo, J. A. Schlueter, M. E. Kelly, Jack M. Williams
DOI 10.1103/PhysRevB.54.11973 · Physical Review B
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Abstract
We report transport measurements with field and current parallel to the a axis (perpendicular to the conducting plane) in the organic superconductor κ–(BEDT-TTF)2Cu(NCS)2. The magnetoresistance displays a peak effect as a function of field and temperature with the peak fields increasing linearly with decreasing temperatures. The peak resistance is found to be greater than the normal-state value extrapolated from both high- and low-field measurements. The results are in sharp contrast to the conventional dissipation mechanisms in the mixed state for anisotropic superconductors, as in the case of Bi2Sr2CaCu2O8. We propose a phenomenological model that the peak in the magnetoresistance is caused by a scattering mechanism due to a strong coupling to the underlying crystal lattice of fluctuating vortices (vortex polarons). The model can semiquantitatively fit the data. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.2 | Pressure unresolved | unknown |
| Bi2Sr2CaCu2O8 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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