Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetothermopower of $\delta$-doped LaTiO$_3$/SrTiO$_3$ interfaces in
  the Kondo regime   Measurements of magneto-thermopower (S(H, T)) of interfacial delta doped
LaTiO$_3$/SrTiO$_3$ (LTO/STO) heterostructure by an iso-structural
antiferromagnetic perovskite LaCrO$_3$ are reported. The thermoelectric power
of the pure LTO/STO interface at 300 K is $\approx$ 118 $\mu$V/K, but increases
dramatically on $\delta$-doping. The observed linear temperature dependence of
S(T) over the temperature range 100 K to 300 K is in agreement with the theory
of diffusion thermopower of a two-dimensional electron gas. The S(T) displays a
distinct enhancement in the temperature range (T $<$ 100 K) where the sheet
resistance shows a Kondo-type minimum. We attributed this maximum in S(T) to
Kondo scattering of conduction electron by localized impurity spins at the
interface. The suppression of S by a magnetic field, and the isotropic nature
of the suppression in out-of-plane and in-plane field geometries further
strengthen the Kondo model based interpretation of S(H, T).

13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int