Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrical detection of free induction decay and Hahn echoes in
  phosphorus doped silicon   Paramagnetic centers in a solid-state environment usually give rise to
inhomogenously broadened electron paramagnetic resonance (EPR) lines, making
conventionally detected free induction decay (FID) signals disappear within the
spectrometer dead time. Here, experimental results of an electrically detected
FID of phosphorus donors in silicon epilayers with natural isotope composition
are presented, showing Ramsey fringes within the first 150 ns. An analytical
model is developed to account for the data obtained as well as for the results
of analogous two-pulse echo experiments. The results of a numerical calculation
are further presented to assess the capability of the method to study spin-spin
interactions.

11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
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
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph