Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductance quantization in etched Si/SiGe quantum point contacts   We fabricated strongly confined Schottky-gated quantum point contacts by
etching Si/SiGe heterostructures and observed intriguing conductance
quantization in units of approximately 1e2/h. Non-linear conductance
measurements were performed depleting the quantum point contacts at fixed
mode-energy separation. We report evidences of the formation of a half 1e2/h
plateau, supporting the speculation that adiabatic transmission occurs through
1D modes with complete removal of valley and spin degeneracies.

33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th