Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strain-induced quantum ring hole states in a gated vertical quantum dot   We have experimentally investigated the hole states in a gated vertical
strained Si/SiGe quantum dot. We demonstrate the inhomogeneous strain
relaxation on the lateral surface creates a ring-like potential near the
perimeter of the dot, which can confine hole states exhibiting quantum ring
characteristics. The magnetotunneling spectroscopy exhibits the predicted
periodicity of energy states in \phi/\phi0, but the magnitude of the energy
shifts is larger than predicted by simple ring theory. Our results suggest a
new way to fabricate and study quantum ring structures.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an