Journal article

Publication year: 1995

Pages: 5776-5780

Journal: The Journal of Chemical Physics

Volume number: 103

Issue number: 13

ISSN: 0021-9606

DOI Link: https://doi.org/10.1063/1.470458

Publisher: American Institute of Physics

Abstract: 
We investigate by Monte Carlo simulations the frequency dependent conductivity sigma(omega,T) and the spin lattice relaxation rate 1/T-1(omega,T) due to the hopping motion of noninteracting particles in an uncorrelated and correlated disordered energy landscape. The conductivity shows a pronounced dispersion at low temperatures in both the correlated and the uncorrelated case, reminiscent of the non-Debye behavior observed in many disordered materials. In contrast, 1/T-1(omega,T) exhibits the typical non-BPP form for uncorrelated energy disorder, but obeys an ordinary BPP-type behavior in the presence of finite correlations. Our results show that in general a simple relation between sigma(omega,T) and 1/T-1(omega,T) does not exist and that it might be difficult to account for the experimental findings, if interactions between the mobile particles are neglected. (C) 1995 American Institute of Physics.

Harvard Citation style: MAASS, P. and MEYER, M. (1995) CONDUCTIVITY VERSUS SPIN-LATTICE RELAXATION - CONTRASTING BEHAVIOR IN A CORRELATED DISORDERED STRUCTURE, The Journal of Chemical Physics, 103(13), pp. 5776-5780. https://doi.org/10.1063/1.470458

APA Citation style: MAASS, P., & MEYER, M. (1995). CONDUCTIVITY VERSUS SPIN-LATTICE RELAXATION - CONTRASTING BEHAVIOR IN A CORRELATED DISORDERED STRUCTURE. The Journal of Chemical Physics. 103(13), 5776-5780. https://doi.org/10.1063/1.470458