Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron-electron interaction correction and magnetoresistance in tilted
  fields in Si-based 2D systems   We study diffusive electron-electron interaction correction to conductivity
by analyzing simultaneously $\rho_{xx}$ and $\rho_{xy}$ for disordered 2D
electron systems in Si in tilted magnetic field. Tilting the field is shown to
be a straightforward tool to disentangle spin and orbital effects. In
particular, by changing the tilt angle we prove experimentally that in the
field range $g\mu_BB>k_BT$ the correction depends on modulus of magnetic field
rather than on its direction, which is expected for a system with isotropic
$g$-factor. In the high-field limit the correction behaves as $\ln (B)$, as
expected theoretically (Lee, Ramakrishnan, Phys. Rev. B{\bf 26}, 4009 (1982)).
Our data prove that the diffusive electron-electron interaction correction to
conductivity is not solely responsible for the huge and temperature dependent
magnetoresistance in parallel field, typically observed in Si-MOSFETs.

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The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: econ
24
The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
10
The categories of this paper are: q-bio