Competing states in the t-J model: uniform d-wave state versus stripe state

Abstract

Variational studies of the t-J model on the square lattice based on infinite projected-entangled pair states (iPEPS) confirm an extremely close competition between a uniform d-wave superconducting state and different stripe states. The site-centered stripe with an in-phase d-wave order has an equal or only slightly lower energy than the stripe with anti-phase d-wave order. The optimal stripe filling is not constant but increases with J/t. A nematic anisotropy reduces the pairing amplitude and the energies of stripe phases are lowered relative to the uniform state with increasing nematicity.

6 pages, 4 figures, 4 pages of supplemental material

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• Probing universal imaginary-time relaxation critical dynamics with infinite projected entangled pair states
• Programmable order by disorder effect and underlying phases through dipolar quantum simulators
• Accurate computation of the energy variance and $⟨⟨{\mathcal{L}}^{†}\mathcal{L}⟩⟩$ using iPEPS
• Dual role of stripe phase on superconducting correlation in a bilayer square lattice
• Determination of ground states of one-dimensional quantum systems using the cluster iTEBD method
• Generalized Nagaoka ferromagnetism accompanied by flavor-selective Mott states in an SU($N$) Fermi-Hubbard model
• Grassmann tensor networks
• Dynamical Spectral Function of the Kagome Quantum Spin Liquid
• Phase diagram of the single-flavor Gross--Neveu--Wilson model from the Grassmann corner transfer matrix renormalization group