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Variational study of triangular lattice spin-1∕2model with ring exchanges and spin liquid state inκ−(ET)2Cu2(CN)3
Open accessAbstract
We study triangular lattice spin-$1∕2$ system with antiferromagnetic Heisenberg and ring exchanges using variational approach focusing on possible realization of spin-liquid states. Trial spin liquid wave functions are obtained by Gutzwiller projection of fermionic mean-field states and their energetics is compared against magnetically ordered trial states. We find that in a range of the ring exchange coupling upon destroying the antiferromagnetic order, the best such spin liquid state is essentially a Gutzwiller-projected Fermi sea state. We propose this spin liquid with a spinon Fermi surface as a candidate for the nonmagnetic insulating phase observed in the organic compound $\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{ET})}_{2}{\mathrm{Cu}}_{2}{(\mathrm{CN})}_{3}$, and describe some experimental consequences of this proposal.
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Cited by
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Metadata
- Authors
- Motrunich, O. I.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2005-07-05
- Volume
- 72
- Issue
- 4
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W1519188459
- Cited by
- 446
- References
- 0
- FWCI
- 10.34
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Variational study of triangular lattice spin-1∕2model with ring exchanges and spin liquid state inκ−(ET)2Cu2(CN)3. https://app.cochat.ai/papers/10.1103/physrevb.72.045105
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- Motrunich, O. I. (2005). Variational study of triangular lattice spin-1∕2model with ring exchanges and spin liquid state inκ−(ET)2Cu2(CN)3. Physical Review B. https://doi.org/10.1103/physrevb.72.045105
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