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

ORAL

Abstract

We generalize the typical medium dynamical cluster approximation to disordered systems with multiple bands. Using our extended formalism, we perform a systematic study of the non-local correlation effects induced by disorder on the density of states and the mobility edge of the Anderson localized states. We apply our method to the three dimensional multiband Anderson model with both inter- and intra-band hopping and disorder potential and find fast convergence with increasing cluster size. Our results are consistent with the ones obtained by the transfer matrix and the kernel polynomial methods. Our findings show that the typical medium dynamical cluster approximation method can be used to study the Anderson localization in real materials.

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Authors

  • Yi Zhang

    Louisiana State Univ - Baton Rouge

  • Hanna Terletska

    Louisiana State University, Ames Laboratory, Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Louisiana State University. Ames lab.

  • Conrad Moore

    Louisiana State University, Louisiana State Univ - Baton Rouge

  • Chinedu Ekuma

    Louisiana State University, Louisiana State Univ - Baton Rouge, Louisiana State University and A\&M College

  • Ka-Ming Tam

    Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Lousiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • Juana Moreno

    Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics and Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • Mark Jarrell

    Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Department of Physics and Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA