Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leaky interface phonons in AlGaAs/GaAs structures   A dispersion equation for the interface waves has been derived for the
interface of two cubic crystals in the plane perpendicular to [001]. A
reasonable hypothesis has been made about the total number of the acoustic
modes. Due to this hypothesis the number is 64, but not all of the modes have
physical meaning of the interface waves. The rules have been worked out to
select physical branches among all 64 roots of dispersion equation. The
physical meaning of leaky interface waves is discussed. The calculations have
been made for the interface Al$_{0.3}$Ga$_{0.7}$As/GaAs. In this case all
physical interface modes have been shown to be leaky. The velocities of the
interface waves are calculated as a function of an angle in the plane of
interface. The results support a recent interpretation of a new type
oscillations of magnetoresistance as a resonant scattering of two-dimensional
electron gas by the leaky interface phonons.

11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph