| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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A Possible Quantum Spin Liquid Phase in the Kitaev–Hubbard Model |
| Shaojun Dong1, Hao Zhang2,3, Chao Wang1, Meng Zhang2,3, Yong-Jian Han1,2,3*, and Lixin He1,2,3,4* |
1Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei 230088, China
2CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
4Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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| Cite this article: |
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Shaojun Dong, Hao Zhang, Chao Wang et al 2023 Chin. Phys. Lett. 40 126403 |
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Abstract The quantum spin liquid (QSL) state of Kitaev-like materials, such as iridium oxides $A_2$IrO$_3$ and $\alpha$-RuCl$_3$, has been explored in depth. The half-filled Kitaev–Hubbard model with bond-dependent hopping terms is used to describe the Kitaev-like materials, which is calculated using the state-of-the-art fermionic projected entangled pair states method. We find a QSL phase near the Mott insulator transition, which has a strong first-order transition to the semi-metal phase with the decrease of Hubbard $U$. We suggest that a promising approach to finding QSL states is by finding iridium oxides that are near the Mott insulator transition.
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Received: 12 September 2023
Editors' Suggestion
Published: 06 December 2023
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| PACS: |
64.70.Tg
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(Quantum phase transitions)
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