Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact quantum spin liquids with Fermi surfaces in spin-half models   An emergent Fermi surface in a Mott insulator, an exotic quantum spin liquid
state, was suggested by Anderson in 1987. After a quick support for its
existence in spin-half Heisenberg model in a square lattice in a RVB mean field
theory, pseudo Fermi surface was found only recently in an exactly solvable
spin-3/2 model by Yao, Zhang and Kivelson. We show that a minimal spin-half
Kitaev model on a decorated square lattice exhibits a Fermi surface. Volume and
shape of the Fermi surface change with exchange couplings or on addition of a 3
spin interaction terms.

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The categories of this paper are: comp-gas
18
The categories of this paper are: econ
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph