Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Schwinger boson spin liquid states on square lattice   We study possible spin liquids on square lattice that respect all lattice
symmetries and time-reversal symmetry within the framework of Schwinger boson
(mean-field) theory. Such spin liquids have spin gap and emergent Z_2 gauge
field excitations. We classify them by the projective symmetry group method,
and find six spin liquid states that are potentially relevant to the J_1-J_2
Heisenberg model. The properties of these states are studied under mean-field
approximation. Interestingly we find a spin liquid state that can go through
continuous phase transitions to either the N\'eel magnetic order or magnetic
orders of the wavevector at Brillouin zone edge center. We also discuss the
connection between our results and the Abrikosov fermion spin liquids.

27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin