Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of the thermoelectric power by electronic correlations in
  bad metals: a study of the Kelvin formula   In many strongly correlated electron metals the thermoelectric power has a
non-monotonic temperature dependence and values that are orders of magnitude
larger than for elemental metals. Kelvin proposed a particularly simple
expression for the thermopower in terms of the temperature dependence of the
chemical potential. We consider a Hubbard model on an anisotropic triangular
lattice at half filling, a minimal effective Hamiltonian for several classes of
organic charge transfer salts. The finite temperature Lanczos method is used to
calculate the temperature dependence of the thermopower using the Kelvin
formula. We find that electronic correlations significantly enhance the
magnitude of the thermopower and lead to a non-monotonic temperature
dependence. The latter reflects a crossover with increasing temperature from a
Fermi liquid to a bad metal. Although, the Kelvin formula gives a
semi-quantitative description of some experimental results it cannot describe
the directional dependence of the sign of the thermopower in some materials.

15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ