Electronic density of states of incommensurate-disordered systems

ANA MARIA LLOIS; MARIANA WEISSMANN; NORAH V COHAN

PHYSICAL REVIEW B - SOLID STATE

APS

Lugar: New York; Año: 1983 vol. 27 p. 7379 - 7385

0556-2805

We have calculated the electronic density of states of one-dimensional incommensurate systems within the tight-binding approximation with first-neighbor interactions for several modulation functions for the self-energies. Among them, zigzag, sawtooth, and solitonlikefunctions were used. We find that the density of states is strongly dependent on the type of modulation. Two different types of disorder were introduced simulating a melting process, becoming the systems practically indistinguishable from a totally disordered model evenwhen partially disordered.