DMFT study of the local correlation effects in quasi-periodic system

International Conference on Strongly Correlated Electron Systems 2014

Takemori, Nayuta^1 ; Koga, Akihisa^1

Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo

152-8551, Japan^1

关键词: Density of state;    Dynamical mean-field theory;    Local correlations;    Mott transitions;    Penrose lattices;    Quasi-periodic lattices;    Quasi-periodic structures;    Quasiperiodic systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012038/pdf
DOI  :  10.1088/1742-6596/592/1/012038

来源: IOP

【 摘 要 】

We study a two-dimensional Hubbard model on a Penrose lattice by means of the real-space dynamical mean-field theory. Calculating the renormalization factor and density of states at each site, we discuss local electron correlations on the quasi-periodic structure. It is found that the renormalized metallic state appears near the Mott transition in the Penrose lattice system. We also address a spatially-dependent renormalization characteristic of the quasi-periodic lattice.