Eloisa Bentivegna
Big Data 2022
In the large-U limit, the Falicov-Kimball model maps onto an effective Ising model, with an order parameter described by a BCS-like mean-field theory in infinite dimensions. In the small-U limit, van Dongen and Vollhardt showed that the order parameter assumes a strange non-BCS-like shape with a sharp reduction near T≈Tc/2. Here we numerically investigate the crossover between these two regimes and qualitatively determine the order parameter for a variety of different values of U. We find the overall behavior of the order parameter as a function of temperature to be quite anomalous. © 2003 The American Physical Society.
Eloisa Bentivegna
Big Data 2022
Frank Stem
C R C Critical Reviews in Solid State Sciences
T. Schneider, E. Stoll
Physical Review B
J.H. Stathis, R. Bolam, et al.
INFOS 2005