Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interband characterization and electronic transport control of
  nanoscaled GeTe/Sb$_2$Te$_3$ superlattices   The extraordinary electronic and optical properties of the
crystal-to-amorphous transition in phase-change materials led to important
developments in memory applications. A promising outlook is offered by
nanoscaling such phase-change structures. Following this research line, we
study the interband optical transmission spectra of nanoscaled
GeTe/Sb$_2$Te$_3$ chalcogenide superlattice films. We determine, for films with
varying stacking sequence and growth methods, the density and scattering time
of the free electrons, and the characteristics of the valence-to-conduction
transition. It is found that the free electron density decreases with
increasing GeTe content, for sub-layer thickness below $\sim$3 nm. A simple
band model analysis suggests that GeTe and Sb$_2$Te$_3$ layers mix, forming a
standard GeSbTe alloy buffer layer. We show that it is possible to control the
electronic transport properties of the films by properly choosing the
deposition layer thickness and we derive a model for arbitrary film stacks.

11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an