Metamagnetism in the two-dimensional Hubbard model with easy axis
نویسندگان
چکیده
منابع مشابه
Superconductivity in the two-dimensional Hubbard model.
A refined variational wave function for the two-dimensional repulsive Hubbard model is studied numerically , with the aim of approaching the difficult crossover regime of intermediate values of U. The issue of a superconducting ground state with d-wave symmetry is investigated for an average electron density n ≈ 0.8 and for U = 8t. Due to finite-size effects a clear-cut answer to this fundament...
متن کاملTwo-dimensional Hubbard model: Numerical simulation study.
We have studied the two-dimensional Hubbard model on a square lattice with nearest-neighbor hopping. We first discuss the properties of the model within the mean-field approximation: Because of the form of the band structure, some peculiar features are found. We then discuss the simulation algorithm used and compare simulation results with exact results for 6-site chains to test the reliability...
متن کاملSuperconductivity and the pseudogap in the two-dimensional Hubbard model.
Recently developed numerical methods have enabled the explicit construction of the superconducting state of the Hubbard model of strongly correlated electrons in parameter regimes where the model also exhibits a pseudogap and a Mott insulating phase. d(x(2)-y(2)) symmetry superconductivity is found to occur in proximity to the Mott insulator, but separated from it by a pseudogapped nonsupercond...
متن کاملFerromagnetism and triplet superconductivity in the two-dimensional Hubbard model
We review magnetic and superconducting instabilities in the t-t Hubbard model on the two-dimensional square lattice as obtained with functional one-loop renormalization group techniques. Special emphasis is put on ferromagnetic and triplet superconducting tendencies that could be relevant to the triplet superconductor Sr2RuO4. The layered perovskite oxide Sr2RuO4 may become the first well-estab...
متن کاملUniversal conductivity in the two-dimensional boson Hubbard model.
We use Quantum Monte Carlo to evaluate the conductivity σ of the 2–dimensional disordered boson Hubbard model at the superfluid-bose glass phase boundary. At the critical point for particle density ρ = 0.5, we find σ c = (0.45 + 0.07)σ Q , where σ Q = e 2 * /h from a finite size scaling analysis of the superfluid density. We obtain σ c = (0.47 + 0.08)σ Q from a direct calculation of the current...
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: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.56.r10005