Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetoresistance from quenching of spin quantum correlation in organic
  semiconductors   We present a theory of organic magnetoresistance (OMR) based on the quenching
of the quantum correlation between the carrier's spin and its local environment
when the incoherent hopping takes place. We prove that this process contributes
a spin-dependent prefactor to the attempt-to-escape frequency in the hopping
rate, with its value modulated by the magnetic field. The resulting OMR
exhibits a positive Lorentzian saturation component and a negative small-field
component, which are independent of model parameters. These behaviors, with
their isotope effects, are in good agreement with experimental results.

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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess