To clarify the property of Mott transition in the strong correlation limit, we investigate the infinite-U Hubbard model using high-temperature expansion method. The free energies in various lattices are obtained as a function of inverse temperature and electron density. If we assume the low temperature behavior as S ∝ T, we can extrapolate the series down to T = 0 with remarkable accuracy and find that the specific heat coefficient γ diverges with n → 1. Furthermore, it is revealed that the divergence is scaled as γ ∝ ( 1 - n )- x with x ∼ 1.7- 1.8, which is almost irrespective of lattice structure.
- Infinite-U Hubbard model
- Mott transition
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering