Stripe formation in high-Tc superconductors

Abstract

The non-uniform ground state of the two-dimensional three-band Hubbard model for the oxide high-Tc superconductors is investigated using a variational Monte Carlo method. We examine the effect produced by holes doped into the antiferromagnetic (AF) background in the underdoped region. It is shown that the AF state with spin modulations and stripes is stabilized du to holes travelling in the CuO plane. The structures of the modulated AF spins are dependent upon the parameters used in the model. The effect of the boundary conditions is reduced for larger systems. We show that there is a region where incommensurability is proportional to the hole density. Our results give a consistent description of stripes observed by the neutron- scattering experiments based on the three-band model for CuO plane.

8 pages, 9 figures

References in corpus (13)

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• Experimental demonstration of quantum correlations over more than 10 km
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• Static and dynamic spin correlations in the spin-glass phase of slightly-doped La_{2-x}Sr_xCuO_4
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• Stripes and the t-J model
• Variational Monte Carlo Study on the Superconductivity in the Two-Dimensional Hubbard Model
• Electronic Structure of Stripes in Two-Dimensional Hubbard Model
• Quantum Monte Carlo Study of Hole Binding and Pairing Correlations in the Three-Band Hubbard Model
• Off-diagonal Wave Function Monte Carlo Studies of Hubbard Model I
• Quantum Monte Carlo evidence for superconductivity in the three-band Hubbard model in two dimensions

Cited by in corpus (9)

• Incommensurate Antiferromagnetism Coexisting with Superconductivity in Two-Dimensional d-p Model
• Lattice distortions, incommensurability, and stripes in the electric model for high-Tc cuprates
• Phase diagram of the t-U^2 Hamiltonian of the weak coupling Hubbard model
• Enhanced pair-correlation functions in the two-dimensional Hubbard model
• Quantum Monte Carlo diagonalization for many-fermion systems
• Enhancement of superconductivity due to kinetic-energy effect in the strongly correlated phase of the two-dimensional Hubbard model
• Fermi arc in doped high-Tc cuprates
• Spin vortices, skyrmions and the Kosterlitz-Thouless transition in the two-dimensional antiferromagnet
• Superconductivity and inhomogeneous charge-ordered state in the two-Dimensional Hubbard model -- Off-Diagonal Wave Function Monte Carlo Studies of Hubbard Model IV