The cluster dynamic mean field theory (DMFT) was used for the investigation of the Mott transition. The cellular DMFT (CDMFT) approximation on a 2 × 2 square cluster of the one-band Hubbard model on a square lattice with and without frustration, was performed by solving the CDMFT equations with quantum Monte Carlo (QMC) method. No evidence for a finite temperature Mott transition was found in the absence of frustration. On the other hand, signatures of a finite temperature Mott transition were observed in a frustration model. It was also observed that a clear momentum dependence of the electron lifetime was developed on the Fermi surface as Mott transition was approached.
ASJC Scopus subject areas
- Physics and Astronomy(all)