Study of off-diagonal disorder using the typical medium dynamical cluster approximation

被引:24
|
作者
Terletska, H. [1 ,2 ]
Ekuma, C. E. [1 ,2 ]
Moore, C. [1 ,2 ]
Tam, K. -M. [1 ,2 ]
Moreno, J. [1 ,2 ]
Jarrell, M. [1 ,2 ]
机构
[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[2] Louisiana State Univ, Ctr Computat & Technol, Baton Rouge, LA 70803 USA
基金
美国国家科学基金会;
关键词
METAL-INSULATOR-TRANSITION; ANDERSON LOCALIZATION; SCALING THEORY; COHERENT; ABSENCE; MODEL; DIFFUSION; STATES;
D O I
10.1103/PhysRevB.90.094208
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We generalize the typical medium dynamical cluster approximation and the local Blackman, Esterling, and Berk method for systems with off-diagonal disorder. Using our extended formalism we perform a systematic study of the effects of nonlocal disorder-induced correlations and off-diagonal disorder on the density of states and the mobility edge of the Anderson localized states. We apply our method to the three-dimensional Anderson model with configuration-dependent hopping and find fast convergence with modest cluster sizes. Our results are in good agreement with the data obtained using exact diagonalization and the transfer-matrix and kernel polynomial methods.
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页数:11
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