3-DIMENSIONAL STRUCTURE OF INDUCED ELECTRORHEOLOGICAL SOLID

The induced electrorheological solid has thick columns in the field direction (z axis), spreading between two electrodes. The ground state is proposed to be a body-centered tetragonal (bct) lattice with a1 = square-root 6ax, a2 = square-root 6ay, and a3 = 2az, where a is the radius of dielectric spheres. This bct lattice can be regarded as a compound of chains of class A and B, where chains B are obtained from chains A by shifting a distance a in the z direction.