Mott transitions in the half-filled SU(2M) symmetric Hubbard model
arXiv:1212.4485 · doi:10.1103/PhysRevB.87.085115
Abstract
The Hubbard model with large orbital degeneracy has recently gained relevance in the context of ultracold earth alkali like atoms. We compute its static properties in the SU(2M) symmetric limit for up to M=8 bands at half filling within dynamical mean-field theory, using the numerically exact multigrid Hirsch-Fye quantum Monte Carlo approach. Based on this unbiased data, we establish scaling laws which predict the phase boundaries of the paramagnetic Mott metal-insulator transition at arbitrary orbital degeneracy M with high accuracy.
10 pages, 10 figures; version to appear in PRB (minor corrections, ref. added)
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