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

Zhang, Yi; Terletska, Hanna; Moore, C.; Ekuma, Chinedu; Tam, Ka-Ming; Berlijn, Tom; Ku, Wei; Moreno, Juana; Jarrell, Mark

doi:10.1103/PhysRevB.92.205111

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

Journal Article · Fri Nov 06 00:00:00 EST 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.205111· OSTI ID:1240595

Zhang, Yi ^[1]; Terletska, Hanna ^[2]; Moore, C. ^[1]; Ekuma, Chinedu ^[1]; Tam, Ka-Ming ^[1]; Berlijn, Tom ^[3]; Ku, Wei ^[4]; Moreno, Juana ^[1]; Jarrell, Mark ^[1]

Louisiana State Univ., Baton Rouge, LA (United States)
Univ. of Michigan, Ann Arbor, MI (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States)

In this paper, 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 K_xFe_2-ySe₂ with Fe vacancies. Despite the strong vacancy disorder and anisotropy, we find the material is not an Anderson insulator. Finally, our results demonstrate the application of the typical medium dynamical cluster approximation method to study Anderson localization in real materials.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Louisiana Board of Regents (United States)

Grant/Contract Number:: SC00112704; AC05-00OR22725; DEAC02-98CH10886; AC02-98CH10886; EPS-1003897

OSTI ID:: 1240595

Alternate ID(s):: OSTI ID: 1225400; OSTI ID: 1261281

Report Number(s):: BNL-111796-2016-JA; R&D Project: PM002; KC0202030

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 20; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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