Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge Dynamics in a Correlated Fermion System on a Geometrically
  Frustrated Lattice   Charge dynamics in an interacting fermionic model on a geometrically
frustrated lattice are examined. We analyze a spinless fermion model on a
paired triangular lattice, an electronic model for layered iron oxides, in zero
and finite temperatures by the exact diagonalization methods. We focus on the
two charge ordered (CO) phases, termed CO_1/2 and CO_1/3, which, respectively,
are realized by the inter-site Coulomb interaction and the quantum/thermal
fluctuations. The optical spectra in CO_1/3 show multiple components and their
low-energy weights are survived even below the ordering temperature (T_CO).
Changes of the dynamical charge correlation below T_CO in CO_1/3 are weakly
momentum dependent, in sharply contrast to CO_1/2. These characteristic
dynamics in CO_1/3 are attributable to the charge frustration effects, and
reproduce some aspects of the recent experimental optical and x-ray scattering
spectra.

32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex