Description of renormalization effect of multiband systems and its application within CMRA theory

ORAL

Abstract

Many interesting physical phenomena, especially those observed in strongly correlated systems, incur a multiband description. A relatively accurate description of these systems is very important to clarify the origin of the observed physics. The recently proposed correlated matrix renormalization approximation (CMRA) introduces a new route to address this problem. As a variational approach, it makes use of possible renormalizations on the density matrix to correctly absorb effects resulting from strong electron-electron interactions. It performs quite well on different H systems. However, the generalization to multiband cases can be nontrivial. In this talk, I will discuss about how renormalization effects can be incorporated into the density matrix in the multiband case, and show the performance of the resulting CMRA on different dimer systems.

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Authors

  • J. Liu

    Iowa State University, Ames Laboratory and Iowa State University

  • Y.X. Yao

    Iowa State University, Ames Laboratory and Iowa State University

  • C. Liu

    Iowa State University, Ames Laboratory and Iowa State University

  • W.C. Lu

    Iowa State University, Jilin University and Qingdao University

  • Cai-Zhuang Wang

    Iowa State University, Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA, Ames Laboratory and Iowa State University, Ames Laboratory, Ames Laboratory-US Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

  • Kai-Ming Ho

    Iowa State University, Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA, Ames Laboratory and Iowa State University, Ames Laboratory, Ames Laboratory-US Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA