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Excitation decay in one-dimensional disordered systems with paired traps

Angel Sánchez

Francisco Domínguez-Adame and Enrique Maciá

  • Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  • Escuela Politécnica Superior, Universidad Carlos III de Madrid, c./Butarque 15, E-28911 Leganés, Madrid, Spain

  • Departamento de Física de Materiales, Facultad de Físicas, Universidad Complutense, E-28040 Madrid, Spain

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Phys. Rev. B 51, 173 – Published 1 January, 1995

DOI: https://doi.org/10.1103/PhysRevB.51.173

Abstract

Incoherent transport of excitations in one-dimensional disordered lattices with pairs of traps placed at random is studied by numerically solving the corresponding master equation. Results are compared to the case of lattices with the same concentration of unpaired traps, and it is found that pairing of traps causes a slowdown of the decay rate of both the mean square displacement and the survival probability of excitations. We suggest that this result is due to the presence of larger trap-free segments in the lattices with paired disorder, which implies that pairing of traps causes less disruption on the dynamics of excitations. In the conclusion we discuss the implications of our work, placing it in a more general context.

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References (22)

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Phys. Rev. B 51, 173– Published 1 January, 1995
  • Received 1 July 1994

© 1995 American Physical Society

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