Study of multiband disordered systems using the typical medium dynamical cluster approximation

被引：5

作者：

Zhang, Yi ^{[1
,2
]}

Terletska, Hanna ^{[3
]}

Moore, C. ^{[1
,2
]}

Ekuma, Chinedu ^{[1
,2
]}

Tam, Ka-Ming ^{[1
,2
]}

Berlijn, Tom ^{[4
,5
]}

Ku, Wei ^{[6
,7
]}

Moreno, Juana ^{[1
,2
]}

Jarrell, Mark ^{[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

[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[4] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[5] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA

[6] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[7] SUNY Stony Brook, Phys Dept, Stony Brook, NY 11790 USA

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 20期

基金：

美国国家科学基金会;

关键词：

ELECTRONIC-STRUCTURE; ANDERSON LOCALIZATION; SCALING THEORY; LATTICE; SUPERCONDUCTIVITY; INSULATOR; SOLIDS; MODEL;

D O I：

10.1103/PhysRevB.92.205111

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 to multiband disordered systems. Using our extended formalism, we perform a systematic study of the nonlocal correlation effects induced by disorder on the density of states and the mobility edge of the three-dimensional two-band Anderson model. We include interband and intraband hopping and an intraband disorder potential. Our results are consistent with those obtained by the transfer matrix and the kernel polynomial methods. We apply the method to KxFe2-ySe2 with Fe vacancies. Despite the strong vacancy disorder and anisotropy, we find the material is not an Anderson insulator. Our results demonstrate the application of the typical medium dynamical cluster approximation method to study Anderson localization in real materials.

引用

页数：9

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