Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1811446 | Physica B: Condensed Matter | 2010 | 5 Pages |
Abstract
We study the effect of a dimer impurity on the local density of states (LDOS) associated with 1D tight binding Hamiltonian. Theoretical analysis is carried out by studying the resulting three-term recursion relation corresponding to the tridiagonal representation of the system Hamiltonian. We found a closed form expression for the perturbed LDOS in terms of the unperturbed one with a pre-factor that carries information on both location and potential strength of the dimer impurity.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H. Bahlouli, A. Al Zahrani, E. El Aaoud, S.M. Al-Marzoug,