Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbital character of O 2p unoccupied states near the Fermi level in CrO2   The orbital character, orientation, and magnetic polarization of the O 2$p$
unoccupied states near the Fermi level ($E_F$) in CrO$_2$ was determined using
polarization-dependent X-ray absorption spectroscopy (XAS) and X-ray magnetic
circular dichroism (XMCD) from high-quality, single-crystal films. A sharp peak
observed just above $E_F$ is excited only by the electric field vector ($\bf
E$) normal to the tetragonal $c$-axis, characteristic of a narrow band
($\approx$ 0.7 eV bandwidth) constituted from O 2$p$ orbitals perpendicular to
$c$ (O 2$p_y$) hybridized with Cr 3$d_{xz-yz}$ $t_{2g}$ states. By comparison
with band-structure and configuration-interaction (CI) cluster calculations our
results support a model of CrO$_2$ as a half-metallic ferromagnet with large
exchange-splitting energy ($\Delta_{exch-split}$ $\approx$ 3.0 eV) and
substantial correlation effects.

8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph