Electrical conductivity and localization in quasiperiodic lattices
Por:
Wang C., Oviedo-Roa R., Pérez L.A., Sánchez V.
Publicada:
1 ene 2001
Resumen:
The electrical conductivity of Fibonacci lattices at zero temperature is studied by means of Kubo and Landauer formalisms, in which a tight-binding Hamiltonian of the system is considered. The localization of the eigenstates is quantified by using the participation ratio and the Lyapunov exponent. The results show a close behavior between the dc conductivity and the Lyapunov exponent. In addition, the effects of the boundary conditions on the ac conductivity are also analyzed in detail.
Filiaciones:
Wang C.:
Instituto de Investigaciones en Mat., Univ. Nacional Autonoma de Mexico, Apartado Postal 70-360, 04510 México, Mexico
Oviedo-Roa R.:
Instituto de Investigaciones en Mat., Univ. Nacional Autonoma de Mexico, Apartado Postal 70-360, 04510 México, Mexico
Pérez L.A.:
Instituto de Investigaciones en Mat., Univ. Nacional Autonoma de Mexico, Apartado Postal 70-360, 04510 México, Mexico
Sánchez V.:
Instituto de Investigaciones en Mat., Univ. Nacional Autonoma de Mexico, Apartado Postal 70-360, 04510 México, Mexico
|