Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Trigonal distortion in the honeycomb iridates: Proximity of zigzag and
  spiral phases in Na2IrO3   The Kitaev honeycomb model has been suggested as a useful starting point to
describe the honeycomb iridates. However, the zigzag ordering seen in Na2IrO3
and the magnetic transition in Li2IrO3 have raised questions to their
connection to the Kitaev model and to the microscopic origin of these magnetic
states, given their structural similarities. Here we study how the magnetic
phases near the Kitaev spin liquid are affected by the inclusion of trigonal
distortion of the oxygen octahedra within a purely nearest neighbour model.
Using a combination classical analysis and exact diagonalization we show that
near the ferromagnetic Kitaev limit a small amount of trigonal distortion, as
found in Na2IrO3, stabilizes a zigzag phase. Decreasing the distortion
destabilizes the zigzag phase toward a spiral phase that may be relevant for
Li2IrO3. Using semi-classical spin-wave calculations we show that this regime
is qualitatively consistent with experimentally known features of the dynamical
structure factor in Na2IrO3 and speculate on implications for Li2IrO3.

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The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: stat