| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Enhanced Intertwined Spin and Charge Orders in the $t$–$J$ Model in a Small $J$ Case |
| Yu Zhang1, Jiawei Mei1*, and Weiqiang Chen1,2* |
1Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China
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| Cite this article: |
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Yu Zhang, Jiawei Mei, and Weiqiang Chen 2023 Chin. Phys. Lett. 40 037401 |
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Abstract The one-band $t$–$J$ model captures strong correlations in cuprate high-temperature superconductors. It accounts for the various intertwined spin and charge orders, and the superconductivity in the phase diagrams. To see the correlation effect on the intertwined orders, we implement the density matrix renormalization group method to simulate the $t$–$J$ model in a small $J$ case with $t/J=10$, which is in a deeper Mott region than that with $t/J\simeq3$ in cuprate superconducting compounds. We examine the results on a six-leg lattice with both the nearest and next-nearest-neighbor hoppings and antiferromagnetic coupling, and find the absence of superconductivity and enhanced intertwined spin and charge orders in the phase diagram. Besides the stripe phases, we find a new SDW + CDW phase in which the spin modulation is a $(\pi, \pi)$ antiferromagnetism, while the wavelength of the charge modulation is shorter than that of the stripe phases. Our results suggest the enhanced intertwined orders and suppressed superconductivity in the deep Mott region.
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Received: 19 December 2022
Published: 24 February 2023
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| PACS: |
74.20.-z
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(Theories and models of superconducting state)
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74.72.-h
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(Cuprate superconductors)
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71.10.Fd
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(Lattice fermion models (Hubbard model, etc.))
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