Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron nuclear interactions and electronic structure of spin 3/2 color
  centers in silicon carbide: A high-field pulse EPR and ENDOR study   High-frequency pulse electron paramagnetic resonance (EPR) and electron
nuclear double resonance (ENDOR) were used to clarify the electronic structure
of the color centers with an optically induced high-temperature spin-3/2
alignment in hexagonal 4H-, 6H- and rhombic 15R- silicon carbide (SiC)
polytypes. The identification is based on resolved ligand hyperfine
interactions with carbon and silicon nearest, next nearest and the more distant
neighbors and on the determination of the spin state. The ground state and the
excited state were demonstrated to have spin S = 3/2. The microscopic model
suggested from the EPR and ENDOR results is as follows: a paramagnetic
negatively charged silicon vacancy that is noncovalently bonded to a
non-paramagnetic neutral carbon vacancy, located on the adjacent site along the
SiC symmetry c-axis.

28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex