Millimeter-wave magneto-optical determination of the anisotropy of the superconducting order parameter in the molecular superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2)
- We have used a millimeter-wave magneto-optical technique to study the angle dependence of the high-frequency conductivity of the molecular superconductor κ-(BEDT-TTF)2Cu(NCS)2. The data strongly suggest that the superconducting gap has nodes directed along the b and c directions of the crystal, in agreement with recent theoretical predictions. This supports the idea that the superconductivity in κ-(BEDT-TTF)2Cu(NCS)2 is d wave in nature, and is mediated by spin fluctuations. © 1999 The American Physical Society.
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