Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of Anisotropic Hybridization in YbAlB$_4$ Probed by Linear
  Dichroism in Core-Level Hard X-ray Photoemission Spectroscopy   We have probed the crystalline electric-field ground states of pure $|J =
7/2, J_z = \pm 5/2\rangle$ as well as the anisotropic $c$-$f$ hybridization in
both valence fluctuating systems $\alpha$- and $\beta$-YbAlB$_4$ by linear
polarization dependence of angle-resolved core level photoemission
spectroscopy. Interestingly, the small but distinct difference between \abyb
was found in the polar angle dependence of linear dichroism, indicating the
difference in the anisotropy of $c$-$f$ hybridization which may be essential to
a heavy Fermi liquid state in $\alpha$-YbAlB$_4$ and a quantum critical state
in $\beta$-YbAlB$_4$.

16
The categories of this paper are: stat
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat