... Michail A. Ormont Research activity of the group is related to the theory of transport and optical properties of disordered semiconductors, in particular, the disorder effects in systems of reduced dimensionality. Studies of phonon-assisted hopping transport include the theory of hopping in quasi-one- and quasi-two-dimensional systems and hopping thermoelectric effects. ... Anisotropy in hopping conductivity of quasi-one-dimensional systems. ... Electronic Superstructures in Doped Superlattices. ...