Hidden spin current in doped Mott antiferromagnets
We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground state, which are concomitant with a nonzero total momentum or angular momentum associated with the doped hole. The latt...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/118758 |
| _version_ | 1811069634717155328 |
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| author | Zheng, Wayne Zhu, Zheng Sheng, D. N. Weng, Zheng-Yu |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Zheng, Wayne Zhu, Zheng Sheng, D. N. Weng, Zheng-Yu |
| author_sort | Zheng, Wayne |
| collection | MIT |
| description | We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground state, which are concomitant with a nonzero total momentum or angular momentum associated with the doped hole. The latter determines a nontrivial ground state degeneracy. By further making superpositions of the degenerate ground states with zero or unidirectional spin currents, we show that different patterns of spatial charge and spin modulations will emerge. Such anomaly persists for the odd numbers of holes, but the spin current, ground state degeneracy, and charge/spin modulations completely disappear for even numbers of holes, with the two-hole ground state exhibiting a d-wave symmetry. An understanding of the spin current due to a many-body Berry-like phase and its influence on the momentum distribution of the doped holes will be discussed. |
| first_indexed | 2024-09-23T08:13:29Z |
| format | Article |
| id | mit-1721.1/118758 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:13:29Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1187582022-09-23T11:44:41Z Hidden spin current in doped Mott antiferromagnets Zheng, Wayne Zhu, Zheng Sheng, D. N. Weng, Zheng-Yu Massachusetts Institute of Technology. Department of Physics Zhu, Zheng We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground state, which are concomitant with a nonzero total momentum or angular momentum associated with the doped hole. The latter determines a nontrivial ground state degeneracy. By further making superpositions of the degenerate ground states with zero or unidirectional spin currents, we show that different patterns of spatial charge and spin modulations will emerge. Such anomaly persists for the odd numbers of holes, but the spin current, ground state degeneracy, and charge/spin modulations completely disappear for even numbers of holes, with the two-hole ground state exhibiting a d-wave symmetry. An understanding of the spin current due to a many-body Berry-like phase and its influence on the momentum distribution of the doped holes will be discussed. 2018-10-24T11:01:45Z 2018-10-24T11:01:45Z 2018-10 2018-09 2018-10-02T18:00:15Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/118758 Zheng, Wayne et al. "Hidden spin current in doped Mott antiferromagnets." Physical Review B 98, 16 (October 2018): 165102 © 2018 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.98.165102 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Zheng, Wayne Zhu, Zheng Sheng, D. N. Weng, Zheng-Yu Hidden spin current in doped Mott antiferromagnets |
| title | Hidden spin current in doped Mott antiferromagnets |
| title_full | Hidden spin current in doped Mott antiferromagnets |
| title_fullStr | Hidden spin current in doped Mott antiferromagnets |
| title_full_unstemmed | Hidden spin current in doped Mott antiferromagnets |
| title_short | Hidden spin current in doped Mott antiferromagnets |
| title_sort | hidden spin current in doped mott antiferromagnets |
| url | http://hdl.handle.net/1721.1/118758 |
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