Antiferromagnetism and phase separation in the t-J model at low doping: a variational study

Abstract

Using Gutzwiller-projected wave functions, I estimate the ground-state energy of the t-J model for several variational states relevant for high-temperature cuprate superconductors. The results indicate antiferromagnetism and phase separation at low doping both in the superconducting state and in the staggered-flux normal state proposed for the vortex cores. While phase separation in the underdoped superconducting state may be relevant for the stripe formation mechanism, the results for the normal state suggest that similar charge inhomogeneities may also appear in vortex cores up to relatively high doping values.

4 pages, 3 figures, reference added

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• Projected Wavefunctions and High Temperature Superconductivity
• Evidence for Static Magnetism in the Vortex Cores of Ortho-II YBa${}_2$Cu${}_3$O${}_{6.50}$
• Antiferromagnetic Vortex Core of Tl_2Ba_2CuO_{6+x} Studied by Nuclear Magnetic Resonance
• The types of Mott insulator
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Cited by in corpus (30)

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• From high temperature supercondutivity to quantum spin liquid: progress in strong correlation physics
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• Projective symmetry group classification of chiral spin liquids
• Projected Entangled Pair States at Finite Temperature: Imaginary Time Evolution with Ancillas
• Possible charge instabilities in two-dimensional doped Mott insulators
• Magnetism and superconductivity in the $t-t^{\prime }-J$ model
• Spontaneous breaking of the Fermi surface symmetry in the t-J model: a numerical study
• Projected Entangled Pair States at Finite Temperature: Iterative Self-Consistent Bond Renormalization for Exact Imaginary Time Evolution
• Finite compressibility in the low-doping region of the two-dimensional $t-J$ model
• Charge-fluctuations in lightly hole-doped cuprates: effect of vertex corrections
• Fermionic Projected Entangled Pair States at Finite Temperature
• Universal properties of high-temperature superconductors from real-space pairing III: The role of correlated hopping and intersite Coulomb interaction within the t-J-U model
• Two-mode variational Monte Carlo study of Quasiparticle excitations in cuprates
• Stability of Inhomogeneous Superstructures from Renormalized Mean-field Theory of the t--J Model
• Phase separation in the vicinity of "quantum critical" doping concentration: implications for high temperature superconductors
• Staggered Flux State in Two-Dimensional Hubbard Models
• Band-Renormalization Effects and Predominant Antiferromagnetic Order in Two-Dimensional Hubbard Model
• Effective approach to the Nagaoka regime of the two dimensional t-J model
• Spin-rotationally symmetric domain flux phases in underdoped cuprates
• Supersolid phases of a doped valence-bond quantum antiferromagnet: Evidence for a coexisting superconducting order parameter
• Bond-order modulated staggered flux phase for the $t-J$ model on the square lattice
• Projected d-wave superconducting state: a fermionic projected entangled pair state study
• Fractional charge and emergent mass hierarchy in diagonal two-leg t-J cylinders
• Antiferromagnetism in two-dimensional t-J model: pseudospin representation
• SU(2) approach to the pseudogap phase of high-temperature superconductors: electronic spectral functions
• Computational scheme for the spin-1/2 square lattice Heisenberg antiferromagnet based on an octapartite description of the square lattice
• Competing pair density wave orders in the square lattice $t$-$J$ model