Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variational study of triangular lattice spin-1/2 model with ring
  exchanges and spin liquid state in \kappa-(ET)_2 Cu_2 (CN)_3   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 spinon Fermi surface as a candidate for
the nonmagnetic insulating phase observed in the organic compound \kappa-(ET)_2
Cu_2 (CN)_3, and describe some experimental consequences of this proposal.

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The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
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The categories of this paper are: eess