Abstract
The nature of the Mott-Hubbard metal-insulator transition in the infinite-dimensional Hubbard model is investigated by quantum Monte Carlo simulations down to temperature ( ). Calculating with significantly higher precision than in previous work, we show that the hysteresis below , reported in earlier studies, disappears. Hence the transition is found to be continuous rather than discontinuous down to at least . We also study the changes in the density of states across the transition, which illustrate that the Fermi liquid breaks down before the gap opens.
- Received 16 February 1999
DOI:https://doi.org/10.1103/PhysRevLett.82.4890
©1999 American Physical Society