Resonant Raman scattering on single crystals of (BEDT-TTF)2Cu(NCS)2

Abstract

Resonant Raman spectra of the organic superconductor (BEDT-TTF)2Cu(NCS)2 have been measured at 1.3 K as well as at 120 K. The Raman data do not show a superconducting gap opening in the investigated two dimensional superconducting system. The vibrational modes found in the Raman spectra are discussed and assigned. Possible mechanisms for resonance conditions in such two-dimensional organic superconducting systems are proposed.