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Hidden Anderson localization in disorder-free Ising–Kondo lattice |
Wei-Wei Yang(杨薇薇), Lan Zhang(张欄), Xue-Ming Guo(郭雪明), and Yin Zhong(钟寅)† |
1 School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of the MoE, Lanzhou University, Lanzhou 730000, China |
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Abstract Anderson localization (AL) phenomena usually exist in systems with random potential. However, disorder-free quantum many-body systems with local conservation can also exhibit AL or even many-body localization transition. We show that the AL phase exists in a modified Kondo lattice without external random potential. The density of state, inverse participation ratio and temperature-dependent resistance are computed by classical Monte Carlo simulation, which uncovers an AL phase from the previously studied Fermi liquid and Mott insulator regimes. The occurrence of AL roots from quenched disorder formed by conservative localized moments. Interestingly, a many-body wavefunction is found, which captures elements in all three paramagnetic phases and is used to compute their quantum entanglement. In light of these findings, we expect that the disorder-free AL phenomena can exist in generic translation-invariant quantum many-body systems.
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Received: 10 February 2020
Revised: 02 June 2020
Accepted manuscript online: 05 June 2020
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PACS:
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72.15.Rn
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(Localization effects (Anderson or weak localization))
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75.30.Mb
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(Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)
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Corresponding Authors:
†Corresponding author. E-mail: zhongy@lzu.edu.cn
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About author: †Corresponding author. E-mail: zhongy@lzu.edu.cn * Project supported in part by the National Natural Science Foundation of China (Grant Nos. 11704166, 11834005, and 11874188). |
Cite this article:
Wei-Wei Yang(杨薇薇), Lan Zhang(张欄), Xue-Ming Guo(郭雪明), and Yin Zhong(钟寅)† Hidden Anderson localization in disorder-free Ising–Kondo lattice 2020 Chin. Phys. B 29 107301
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