# Finite compressibility in the low-doping region of the two-dimensional t-J model

@article{Lugas2006FiniteCI, title={Finite compressibility in the low-doping region of the two-dimensional t-J model}, author={Massimo Lugas and Leonardo Spanu and Federico Becca and Sandro Sorella}, journal={Physical Review B}, year={2006}, volume={74}, pages={165122} }

We reexamine the important issue of charge fluctuations in the two-dimensional $t\text{\ensuremath{-}}J$ model by using an improved variational method based on a wave function that contains both antiferromagnetic and $d$-wave superconducting order parameters. In particular, we generalize the wave function introduced some time ago by Bouchaud, Georges, and Lhuillier [J. Phys. (Paris) 49, 553 (1988)] by considering also a long-range spin-spin Jastrow factor, in order to correctly reproduce the…

## 17 Citations

Magnetism and superconductivity in the t − t ′ − J model

- Physics
- 2007

We present a systematic study of the phase diagram of the $t{-}t^\prime{-}J$ model by using the Green's function Monte Carlo (GFMC) technique, implemented within the fixed-node (FN) approximation and…

Superconductivity in the two-dimensional Hubbard model: Gutzwiller wave function solution

- Physics
- 2013

A systematic diagrammatic expansion for Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hubbard model with…

Ising t-J model close to half filling: a Monte Carlo study.

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2009

Within the recently proposed doped-carrier representation of the projected lattice electron operators we derive a full Ising version of the t-J model. This model possesses the global discrete Z(2)…

Crossover between BCS Superconductor and Doped Mott Insulator of d-wave Pairing State in Two-Dimensional Hubbard Model

- Physics
- 2012

With high-Tc cuprates in mind, properties of correlated dx2-y2-wave superconducting (SC) and antiferromagnetic (AF) states are studied for the Hubbard (t-t'-U) model on square lattices, using a…

Interhole correlation and phase separation in t-J model

- PhysicsJournal of Physics: Conference Series
- 2018

Interhole and interelectron correlations as well as a transition to phase separation in the t-J model near half filling are reconsidered using a variational Monte Carlo method. As a trial wave…

Strong coupling expansion of the extended Hubbard model with spin-orbit coupling

- Physics
- 2014

We study the strong coupling limit of the extended Hubbard model in two dimensions. The model consists of hopping, on-site interaction, nearest-neighbor interaction, spin-orbit coupling and Zeeman…

Period 4 stripe in the extended two-dimensional Hubbard model

- PhysicsPhysical Review B
- 2019

We study the competition between stripe states with different periods and a uniform d-wave superconducting state in the extended two-dimensional Hubbard model at 1/8 hole doping using infinite…

Gutzwiller–RVB theory of high-temperature superconductivity: Results from renormalized mean-field theory and variational Monte Carlo calculations

- Physics
- 2007

We review the resonating valence bond (RVB) theory of high-temperature superconductivity using Gutzwiller projected wave functions that incorporate strong correlations. After a general overview of…

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