Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant magnetic in-plane anisotropy and competing instabilities in
  Na3Co2SbO6   We report magnetometry data obtained on twin-free single crystals of
Na3Co2SbO6, which is considered a candidate material for realizing the Kitaev
honeycomb model for quantum spin liquids. Contrary to a common belief that such
materials can be modeled with the symmetries of an ideal honeycomb lattice, our
data reveal a pronounced two-fold symmetry and in-plane anisotropy of over
200%, despite the honeycomb layer's tiny orthorhombic distortion of less than
0.2%. We further use magnetic neutron diffraction to elucidate a rich variety
of field-induced phases observed in the magnetometry. These phases manifest
themselves in the paramagnetic state as diffuse scattering signals associated
with competing ferro- and antiferromagnetic instabilities, consistent with a
theory that also predicts a quantum spin liquid phase nearby. Our results call
for theoretical understanding of the observed in-plane anisotropy, and render
Na3Co2SbO6 a promising ground for finding exotic quantum phases by targeted
external tuning.

21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph