Thermodynamics of the 2D Hubbard model
نویسندگان
چکیده
منابع مشابه
Pseudogaps in the 2D Hubbard Model.
We study the pseudogaps in the spectra of the 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. At half-filling, a charge pseudogap, accompanied by non-Fermi-liquid behavior in the self-energy, is shown to persist in the thermodynamic limit. The DCA (finite-size) method systematically underestimates (overestimates) the width of t...
متن کاملNonextensive thermodynamics of the two-site Hubbard model
Thermodynamical and magnetic properties of the half-filled, two-site Hubbard model have been discussed within the framework of the Tsallis nonextensive statistics. The temperature dependence of the entropy, specific heat and magnetic susceptibility, and the magnetic-field dependence of the magnetization have been calculated for various values of the entropic index q: the result for q = 1 in the...
متن کاملNonextensive thermodynamics of the two-site Hubbard model: Canonical ensembles
Canonical ensembles of Hubbard dimers, each of which is described by the two-site Hubbard model, have been studied within the nonextensive statistics (NES). The temperature dependences of the energy, entropy, specific heat and susceptibility have been calculated for the number of dimers M = 1, 2, 3 and ∞. We have assumed the relation between the entropic index q and the cluster size N given by ...
متن کاملNonextensive thermodynamics of the two - site Hubbard model 1
Thermodynamical and magnetic properties of the half-filled, two-site Hubbard model have been discussed within the framework of the Tsallis nonextensive statistics, in which the entropic index q plays an important role, the conventional Boltzman-Gibbs statistics being recovered in the limit of q = 1. The temperature dependence of the entropy, specific heat and magnetic susceptibility, and the ma...
متن کاملThe 2D Hubbard model on the honeycomb lattice
We consider the 2D Hubbard model on the honeycomb lattice, as a model for a single layer graphene sheet in the presence of screened Coulomb interactions. At half filling and weak enough coupling, we compute the free energy, the ground state energy and we construct the correlation functions up to zero temperature in terms of convergent series; analiticity is proved by making use of constructive ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physical Studies
سال: 1999
ISSN: 1027-4642,2310-0052
DOI: 10.30970/jps.03.474