| Abstract
| - We report X-ray diffraction measurements of the charge-ordered organic conductor $\theta $-(BEDT-TTF) 2CsZn(SCN) 4 at various temperatures with external currents. The two kinds of diffuse scattering observed at q1 = (2/3 k 1/3) and q2 = (0 k 1/2) exhibit remarkable difference in the interplane correlation along the b-axis, the temperature dependence, and the electric-current dependence. These observations suggest that the two diffuse scatterings come from spatially different charge-ordered domains. The external current melts the q2-type domains, which can control the competition of the two orders.
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