Voltage oscillation associated with nonlinear conductivity in the organic conductor α-(BEDT-TTF)2I3

Characteristic voltage oscillation phenomenon is observed in an organic conductor alpha-[bis(ethylenedithio)tetrathiafulvalene](2)I-3, in the nonlinear conductivity region below the metal-insulator transition at 135 K. The oscillation, which is clearly visible in the wave form, appears only when the current is applied in the direction of the charge alternation in the two-dimensional stripe charge order. The frequency of order 10 kHz increases linearly with the applied current. These aspects are interpreted from the viewpoint of collective motion of the two-dimensional charge order. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3428388]