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We study electronic transport properties of disordered polymers in a quasi-one-dimensional model with fully three-dimensional interaction potentials. We consider such quasi-one-dimensional lattices in the presence of both uncorrelated and short-[...]texto impreso
We study how the in8uence of structural correlations in disordered systems manifests itself in experimentally measurable magnitudes, focusing on dc conductance of semiconductor superlattices with general potential pro6les. We show that the exist[...]texto impreso
Díez, E. ; Gomez Alcala, R. ; Domínguez-Adame Acosta, Francisco ; Sánchez, A. ; Berman, G.P. | Elsevier | 1998-03-23We investigate the coherent dynamics of carriers in semiconductor superlattices driven by ac-dc electric fields. We solve numerically the time-dependent effective-mass equation for the envelope function. We find that carriers undergo Rabi oscill[...]texto impreso
Díez, E. ; Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso ; Sánchez, A. | American Physical Society | 1996-12-15We present a detailed study of the dynamics of electronic wave packets in Fibonacci semiconductor superlattices, both in flat band conditions and subject to homogeneous electric fields perpendicular to the layers. Coherent propagation of electro[...]texto impreso
Sánchez, A. ; Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso | American Physical Society | 1995-01-01Incoherent transport of excitations in one-dimensional disordered lattices with pairs of traps placed at random is studied by numerically solving the corresponding aster equation. Results are compared to the case of lattices with the same concen[...]texto impreso
Domínguez-Adame Acosta, Francisco ; Méndez Martín, Bianchi ; Sánchez, A. ; Maciá Barber, Enrique Alfonso | American Physical Society | 1994-02-01Numerical investigations of the trapping of Frenkel excitons in one-dimensional lattices with interstitial traps randomly placed in pairs are presented. The probabilities of finding the exciton both in the q = 0 mode P(t) and in any mode Q(t) ha[...]texto impreso
Domínguez-Adame Acosta, Francisco ; Sánchez, A. ; Díez, E. | American Institute of Physics | 1997-01-15We study the quantum dynamics of electronic wave packets in quantum-well based semiconductor superlattices subject to an applied electric field. Using a high-accuracy numerical method, we analyze the dynamical behavior of electronic wave packets[...]texto impreso
Castro, Mario ; Sánchez, A. ; Domínguez-Adame Acosta, Francisco | American Physical Society | 2000-03-01We propose a simple, versatile, and fast computational model to understand the deviations from the well-known Kolmogorov-Johnson-Mehl-Avrami kinetic theory found in metal recrystallization and amorphous semiconductor crystallization. Our model d[...]texto impreso
Castro, Mario ; Domínguez-Adame Acosta, Francisco ; Sánchez, A. ; Rodriguez, T. | Amer Inst Physics | 1999-10-11We propose a simple and versatile model to understand the deviations from the well-known Kolmogorov-Johnson-Mehl-Avrami kinetics theory found in metal recrystallization and amorphous semiconductor crystallization. We analyze the kinetics of the [...]texto impreso
We study resonant tunnelling through double-barrier structures under an applied bias voltage, in which nonlinearities due to self-interaction of electrons in the barrier regions are included. As an approximation, we concern ourselves with thin b[...]texto impreso
Díez, E. ; Gómez-Alcalá, R. ; Domínguez-Adame Acosta, Francisco ; Sánchez, A. ; Berman, G. P. | American Physical Society | 1998-07-15We investigate the dynamics of a semiconductor superlattice driven by an ac electric field by solving numerically the one-dimensional time-dependent Schrodinger equation including interface roughness effects. Rabi oscillations between minibands [...]
