| Autor: |
Sales MO; Instituto de Física, Universidade Federal de Alagoas, Maceió, AL 57072-970, Brazil., Albuquerque SS, de Moura FA |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2012 Dec 12; Vol. 24 (49), pp. 495401. Date of Electronic Publication: 2012 Nov 12. |
| DOI: |
10.1088/0953-8984/24/49/495401 |
| Abstrakt: |
In this paper we study a one-dimensional ternary harmonic chain with the mass distribution constructed from an Ornstein-Uhlenbeck process. We generate a ternary mass disordered distribution by generating the correlated Ornstein-Uhlenbeck process and mapping it into a sequence of three different values. The probability of each value is controlled by a fixed parameter b. We analyze the localization aspect of the above model by numerical solution of the Hamilton equations and by the transfer matrix formalism. Our results indicate that the correlated ternary mass distribution does not promote the appearance of new extended modes. In good agreement with previous work, we obtain extended modes for b → ∞; however, we explain in detail the main issue behind this apparent localization- delocalization transition. In addition, we obtain the energy dynamics for this classical chain. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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