Josephson plasma resonance in κ−(BEDT−TTF)2Cu(NCS)2
M. M. Mola, J. T. King, C. P. McRaven, S. Hill, J. S. Qualls, J. S. Brooks
DOI 10.1103/PhysRevB.62.5965 · Physical Review B
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Abstract
A cavity perturbation technique is used to study the microwave response of the organic superconductor κ−(BEDT−TTF)2Cu(NCS)2. Observation of a Josephson plasma resonance, below Tc (∼10 K), enables investigation of the vortex structure within the mixed state of this highly anisotropic, type-II superconductor. Contrary to previous assumptions, frequency-dependent studies (28–153 GHz) indicate that the squared plasma frequency (ωp2) depends exponentially on the magnetic-field strength. Such behavior has been predicted for a weakly pinned quasi-two-dimensional vortex lattice [Bulaevskii et al., Phys. Rev. Lett. 74, 801 (1995)]. Our data also suggests a transition in the vortex structure near the irreversibility line.
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. | — | Pressure not reported | unknown |
| YBa2Cu3O6y 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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