Diagonal and off-diagonal correlation effects in anderson-localized states

摘要: Abstract The present paper discusses a general theoretical model which treats the interplay of randomness and electron correlation in Anderson-localized states. In constructing Hamiltonian, behaviour localized states with an envelope function is explicitly taken into account. calculated results spin susceptibility electronic specific heat as well density are presented. It shown that diagonal gives rise to occurrence singly occupied below Fermi energy, E F, this Curie-type at low temperatures. As consequence variation energy from state state, doubly becomes large near F. also off-diagonal effect kinetic exchange interaction between states, favours spin-singlet