Phase separation and three-site hopping in the two-dimensional t-J model

  title={Phase separation and three-site hopping in the two-dimensional t-J model},
  author={Elisa Ercolessi and Pierbiagio Pieri and Marco Roncaglia},
  journal={Physics Letters A},
Ground-state phase diagram of the one-dimensional t−J model with pair hopping terms
The $t$–$J$ model is a standard model of strongly correlated electrons, often studied in the context of high-$T_c$ superconductivity. However, most studies of this model neglect three-site terms,
Competing orders in the Hofstadter t -J model
The Hofstadter model describes noninteracting fermions on a lattice in the presence of an external magnetic field. Motivated by the plethora of solid-state phases emerging from electron interactions,
Utilization of Renormalized Mean-Field Theory upon Novel Quantum Materials
This thesis is aiming in utilizing the strongly correlated t-J Hamiltonian for better understanding the microscopic pictures of certain condensed matter scenario and presents one of the methods called renormalized mean-field theory (RMFT) and exploit it upon the t- J model.
Renormalized Mean Field Theory
  • Wei-Lin Tu
  • Physics
    Utilization of Renormalized Mean-Field Theory upon Novel Quantum Materials
  • 2019
To deal with the issues mentioned in the previous chapter, we chose to follow certain numerical approaches. Like the protocol most of us would follow when encountering a physical scenario, one


Phase diagram of the two-dimensional t-J model at low doping.
  • Poilblanc
  • Physics
    Physical review. B, Condensed matter
  • 1995
The phase diagram of the planar t--J model at small hole doping is investigated by finite size scaling of exact diagonalisation data of NXN clusters (up to 26). Hole-droplet binding energies,
Phase separation in a t-J model.
We study a simple extension of the Heisenberg model which is abstracted from the large-U limit of the Hubbard Hamiltonian and includes charge fluctuations. An attempt is made to elucidate some basic
Phase separation in the large-spin t-J model.
We investigate the phase diagram of the two-dimensional t-J model using a recently developed technique that allows one to solve the mean-field model Hamiltonian with a variational calculation. The
Effect of the three-site hopping term on the t-J model.
We have used exact diagonalization and quantum Monte Carlo methods to study the one-dimensional {ital t}-{ital J} model including the three-site hopping term derived from the strong-coupling limit of
Phase separation in the large-N limit of the t-J model.
A phase separation between a fully dimerized phase at half-filling and a hole-rich uniform phase supporting the occurrence of phase separation in the t-J model between a Fermi-liquid phase and an insulating magnetic phase is found.
Phase separation in the t-J model.
It is shown here that, for the t-J model, dilute holes in an antiferromagnet are unstable against phase separation into a hole-rich and a no-hole phase, and it is proposed that the hole- rich phase is a low-density superfluid of electron pairs.
Hole pairing and clustering in the two-dimensional t-J model.
Hole-density correlation functions in the t-J model on lattices with square geometry are studied by the method of exact diagonalisation for systems of various sizes with up to 26 sites, showing clear evidence for hole-clustering instabilities.
Kinetic exchange interaction in a narrow S-band
A new canonical transformation is applied to the Hubbard Hamiltonian under strong correlation with arbitrary n to obtain an effective Hamiltonian which consists of both the itinerant property of
Aspects of the phase diagram of the two-dimensional t-J model.
The phase diagram of the 2D {ital t}-{ital J} model is investigated using high-temperature expansions and a region of divergent uniform magnetic susceptibility is found.