Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid
We study the energetics of Gutzwiller projected BCS states of various symmetries for the triangular lattice antiferromagnet with a four-particle ring exchange using variational Monte Carlo methods. In a range of parameters the energetically favored state is found to be a projected dx2−y2 paired stat...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/60860 https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 |
| _version_ | 1826212803373957120 |
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| author | Senthil, Todadri Grover, Tarun Lee, Patrick A. Trivedi, N. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Senthil, Todadri Grover, Tarun Lee, Patrick A. Trivedi, N. |
| author_sort | Senthil, Todadri |
| collection | MIT |
| description | We study the energetics of Gutzwiller projected BCS states of various symmetries for the triangular lattice antiferromagnet with a four-particle ring exchange using variational Monte Carlo methods. In a range of parameters the energetically favored state is found to be a projected dx2−y2 paired state which breaks lattice rotational symmetry. We show that the properties of this nematic or orientationally ordered paired spin-liquid state as a function of temperature and pressure can account for many of the experiments on organic materials. We also study the ring-exchange model with ferromagnetic Heisenberg exchange and find that among the studied ansätze, a projected f-wave state is the most favorable. |
| first_indexed | 2024-09-23T15:38:08Z |
| format | Article |
| id | mit-1721.1/60860 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:38:08Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/608602022-10-02T03:04:03Z Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid Senthil, Todadri Grover, Tarun Lee, Patrick A. Trivedi, N. Massachusetts Institute of Technology. Department of Physics Senthil, Todadri Senthil, Todadri Grover, Tarun Lee, Patrick A. We study the energetics of Gutzwiller projected BCS states of various symmetries for the triangular lattice antiferromagnet with a four-particle ring exchange using variational Monte Carlo methods. In a range of parameters the energetically favored state is found to be a projected dx2−y2 paired state which breaks lattice rotational symmetry. We show that the properties of this nematic or orientationally ordered paired spin-liquid state as a function of temperature and pressure can account for many of the experiments on organic materials. We also study the ring-exchange model with ferromagnetic Heisenberg exchange and find that among the studied ansätze, a projected f-wave state is the most favorable. United States. Dept. of Energy (DE-FG02- 07ER46423) National Science Foundation (U.S.) (DMR-0705255) National Science Foundation (U.S.) (DMR- 0804040) 2011-01-28T20:35:01Z 2011-01-28T20:35:01Z 2010-06 2010-05 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/60860 Grover, Tarun et al. “Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid.” Physical Review B 81.24 (2010): 245121. © 2010 The American Physical Society. https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 en_US http://dx.doi.org/10.1103/PhysRevB.81.245121 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. application/pdf American Physical Society APS |
| spellingShingle | Senthil, Todadri Grover, Tarun Lee, Patrick A. Trivedi, N. Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title | Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title_full | Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title_fullStr | Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title_full_unstemmed | Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title_short | Weak Mott insulators on the triangular lattice: Possibility of a gapless nematic quantum spin liquid |
| title_sort | weak mott insulators on the triangular lattice possibility of a gapless nematic quantum spin liquid |
| url | http://hdl.handle.net/1721.1/60860 https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 |
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