The finite-temperature phase diagram of the Hubbard model in d =3 is obtained from renormalization-group analysis. It exhibits, around half filling, an antiferromagnetic phase and, between 30%-40% electron or hole doping from half filling, a new τ phase in which the electron hopping strength...
Thus, here we investigate their effects in strongly correlated systems by performing unbiased quantum Monte Carlo simulations in the square lattice Hubbard-Holstein model at half-filling. We study the competition and interplay between antiferromagnetism (AFM) and charge-density wave (CDW), establishing ...
PhasediagramofthedisorderedBose-Hubbard model VGurarie LPollet NikolaiProkof'ev UniversityofMassachuses-Amherst,prokofev@physics.umass.edu BorisSvistunov UniversityofMassachuses-Amherst,svistunov@physics.umass.edu MTroyer Followthisandadditionalworksat:h p://scholarworks.umass.edu/physics_faculty_pubs ...
Using the dynamical mean-field approximation we investigate the formation of excitonic condensate in the two-band Hubbard model in the vicinity of the spin-state transition. With temperature and band filling as the control parameters we realize all symmetry allowed spin-triplet excitonic phases, some...
model. The ground state phase diagram of the 1/2-filled extended Hubbard model is well studied [39–41]: the low- energy properties of the model are essentially determined by the parameter U − 2|V |. The insulating ground state
Phase diagram of the extended Hubbard model in one spatial dimension. Physical Review B(IF3.2)Pub Date : 1990 May 1 Cannon, Fradkin 中文翻译: 一维空间中扩展Hubbard模型的相图。 更新日期:2017-01-31 点击分享 阅读更多本刊新发论文本刊介绍/投稿指南...
The fermionic Hubbard model (FHM)1 describes a wide range of physical phenomena resulting from strong electron–electron correlations, including conjectured mechanisms for unconventional superconductivity. Resolving its low-temperature physics is, however, challenging theoretically or numerically. Ultracold ferm...
Role of the van Hove Singularity in the Quantum Criticality of the Hubbard Model A quantum critical point (QCP), separating the non-Fermi liquid region fromthe Fermi liquid, exists in the phase diagram of the 2D Hubbard model[Vidhyadhir... K.-S. Chen,S Pathak,S.-X. Yang,... - 《...
PHASE SEPARATION IN THE HUBBARD MODEL The Hartree-Fock ground-state phase diagram of the one-dimensional Hubbard model is calculated in the µ −U plane, restricted to phases with no charge density modulation. This allows antiferromagnetism, saturated ferromagnetism, spi... JH Samson 被引量: ...
of model and physical parameters and the presence of two solutions should be seen as a richness of the method.For the one-dimensional system we will consider only COM2 solution as with this, for the simple Hubbard model,we got excellent agreements with the Bethe Ansatz exact solution [9] ...