Dimer impurity effect on the 1D density of states

作者：Bahlouli H^*; Al Zahrani A; El Aaoud E; Al Marzoug S M

来源：Physica B: Condensed Matter , 2010, 405(21): 4492-4496.

DOI：10.1016/j.physb.2010.08.021

• Density of states
• Tridiagonal matrices
• Recursion relations
• Dimer

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.

• 出版日期2010-11-1
• 单位中国石油大学（北京）