Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nearest-neighbor Kitaev exchange blocked by charge order in electron
  doped $\alpha$-RuCl$_{3}$   A quantum spin-liquid might be realized in $\alpha$-RuCl$_{3}$, a
honeycomb-lattice magnetic material with substantial spin-orbit coupling.
Moreover, $\alpha$-RuCl$_{3}$ is a Mott insulator, which implies the
possibility that novel exotic phases occur upon doping. Here, we study the
electronic structure of this material when intercalated with potassium by
photoemission spectroscopy, electron energy loss spectroscopy, and density
functional theory calculations. We obtain a stable stoichiometry at
K$_{0.5}$RuCl$_3$. This gives rise to a peculiar charge disproportionation into
formally Ru$^{2+}$ (4$d^6$) and Ru$^{3+}$ (4$d^5$). Every Ru 4$d^5$ site with
one hole in the $t_{2g}$ shell is surrounded by nearest neighbors of 4$d^6$
character, where the $t_{2g}$ level is full and magnetically inert. Thus, each
type of Ru sites forms a triangular lattice and nearest-neighbor interactions
of the original honeycomb are blocked.

31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph