Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron spin blockade and singlet-triplet transition in a silicon
  single electron transistor   We investigate a silicon single-electron transistor (SET) in a
metal-oxide-semiconductor (MOS) structure by applying a magnetic field
perpendicular to the sample surface. The quantum dot is defined
electrostatically in a point contact channel and by the potential barriers from
negatively charged interface traps. The magnetic field dependence of the
excitation spectrum is primarily driven by the Zeeman effect. In the
two-electron singlet-triplet (ST) transition, electron-electron Coulomb
interaction plays a significant role. The evolution of Coulomb blockade peaks
with magnetic field B is also owing to the Zeeman splitting with no obvious
orbital effect up to 9 T. The filling pattern shows an alternate
spin-up-spin-down sequence. The amplitude spectroscopy allows for the
observation of the spin blockade effect, where the two-electron system forms a
singlet state at low fields, and the spin polarized injection from the lead
reduces the tunneling conductance by a factor of 8. At a higher magnetic field,
due to the ST transition, the spin blockade effect is lifted and the
conductance is fully recovered.

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The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph