CONDUCTIVITY OF A DISORDERED WIGNER CRYSTAL

We extend our previous theory for the ground state of a disordered ele ctron solid to calculate its transport properties. The Coulomb interac tion is taken in the Hartree-Fock approximation and the potential of c harged impurities in the self-consistent Born approximation. In agreem ent with recent experiments by Li et al. we find, for strong disorder, a linear frequency dependence of the in-phase conductivity. We show h ow the dc conductivity of the system can be determined in our theory. At strong disorder an algebraic temperature dependence of the conducti vity results which is consistent with experiments by Goldman et al.