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Autor Maciá Barber, Enrique Alfonso |
Documentos disponibles escritos por este autor (55)
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Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso ; Méndez Martín, Bianchi | Elsevier Science BV | 1994-10-31We study the electronic structure of a new type of Fibonacci superlattice based on Si delta-doped GaAs. Assuming that delta-doped layers are equally spaced, quasiperiodicity is introduced by selecting two different donor concentrations and arran[...]![]()
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Domínguez-Adame Acosta, Francisco ; Méndez Martín, Bianchi ; Maciá Barber, Enrique Alfonso | IOP publishing ltd | 1994-03The electron dynamics and the density of states of both single and periodic Si delta-doped GaAs subject to an applied electric field are studied theoretically. The space charge potential due to delta-doping is obtained by means of the semiclassi[...]![]()
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A detailed study of charge transport properties of synthetic and genomic DNA sequences is reported. Genomic sequences of the Chromosome 22, lambda-bacteriophage, and D1s80 genes of Human and Pygmy chimpanzee are considered in this work, and comp[...]![]()
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In this work we extend the algebraic approach introduced in the context of general Fibonacci systems [E. Maciá and F. Domínguez-Adame, Phys. Rev. Lett. 76, 2957 (1996)] to analytically study the transmission coefficient of a subset of states in [...]![]()
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Maciá Barber, Enrique Alfonso ; Domínguez-Adame Acosta, Francisco ; Sánchez, Angel | American Physical Soc | 1994-08We study the relationship between the electronic spectrum structure and the configurational order of one-dimensional quasiperiodic systems. We take the Fibonacci case as a specific example, but the ideas outlined here may be useful to accurately[...]![]()
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Sánchez, Angel ; Maciá Barber, Enrique Alfonso ; Domínguez-Adame Acosta, Francisco | American Physical Society | 1994-06-01We consider the electron dynamics and transport properties of one-dimensional continuous models with random, short-range correlated impurities. We develop a generalized Poincare map formalism to cast the Schrodinger equation for any potential in[...]![]()
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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[...]![]()
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Maciá Barber, Enrique Alfonso ; Domínguez-Adame Acosta, Francisco | American Physical Society | 1994-12-15Exciton optical absorption in self-similar aperiodic one-dimensional systems is considered, focusing our attention on Thue-Morse and Fibonacci lattices as canonical examples. The absorption line shape is evaluated by solving the microscopic equa[...]![]()
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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[...]![]()
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In this work we present a prospective study on the potential capabilities of optical devices based on Fibonacci dielectric multilayers. We perform a detailed analytical comparison of the linear optical response of periodic versus quasiperiodic m[...]![]()
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Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso ; Méndez Martín, Bianchi ; Roy, C.L. ; Khan, A. | IOP publishing ltd | 1995-06We report the theoretical electronic structure of Fibonacci superlattices of narrow-gap III-V semiconductors. The electron dynamics is accurately described within the envelope-function approximation in a two-band model. Quasiperiodicity is intro[...]![]()
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Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso | American Physical Society | 1996-05-15We study motion and capture of excitons in self-similar linear systems in which interstitial traps are arranged according to an aperiodic sequence, focusing our attention on Fibonacci and Thue-Morse systems as canonical examples. The decay of th[...]![]()
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We study the phonon dynamics of Fibonacci heterostructures where two kinds of order (namely, periodic and quasiperiodic) coexist in the same sample at different length scales. We derive analytical expressions describing the dispersion relation o[...]![]()
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Domínguez-Adame Acosta, Francisco ; Maciá Barber, Enrique Alfonso ; Sánchez, Angel | American Physical Society | 1995-01-01Incoherent exciton dynamics in one-dimensional perfect lattices with traps at sites arranged according to aperiodic deterministic sequences is studied. We focus our attention on Thue-Morse and Fibonacci systems as canonical examples of self-simi[...]