Ground-State Properties of the $t$-$J$ Model for the CuO Double-Chain Structure
| Autor: | Kaneko, Tatsuya, Ejima, Satoshi, Sugimoto, Koudai, Kuroki, Kazuhiko |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | J. Phys. Soc. Jpn. 93, 084703 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.7566/JPSJ.93.084703 |
| Popis: | We investigate the ground-state properties of a correlated model for the double-chain structure in cuprates. We consider the $t$-$J$ model, in which the nearest-neighbor spin interaction $J_1$ is smaller than the next-nearest-neighbor interaction $J_2$ corresponding to the CuO double-chain structure. We vary $J_1$ from antiferromagnetic to ferromagnetic values and calculate the correlation functions including the superconducting pair correlation function. Employing the density-matrix renormalization group method, we show that the ground state for antiferromagnetic $J_1$ exhibits the hallmarks of the Luther-Emery liquid phase, in which the spin-singlet pair and charge-density-wave correlations exhibit power-law decays against distance, and the spin correlation function decays exponentially. Its signatures are gradually dismissed as $J_1$ approaches the ferromagnetic regime. Our findings suggest that the antiferromagnetic double-chain structure without ferromagnetic bonds is favorable for superconductivity. Comment: 7 pages, 7 figures |
| Databáze: | arXiv |
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