Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of Fano resonance in photoluminescence of a two-dimensional
  magnetic semiconductor   Quantum interference gives rise to the asymmetric Fano resonance line shape
when the final states of an electronic transition follows within a continuum of
states and a discrete state, which has significant applications in optical
switching and sensing. The resonant optical phenomena associated with Fano
resonance have been observed by absorption spectra, Raman spectra, transmission
spectra, etc., but have rarely been reported in photoluminescence (PL)
spectroscopy. In this work, we performed spectroscopic studies on layered
chromium thiophosphate (CrPS4), a promising ternary antiferromagnetic
semiconductor with PL in near-infrared wavelength region and observed Fano
resonance when CrPS4 experiences phase transition into the antiferromagnetic
state below N\'eel temperature (38 K). The photoluminescence of the continuum
states results from the d band transitions localized at Cr3+ ions, while the
discrete state reaches saturation at high excitation power and can be enhanced
by the external magnetic field, suggesting it is formed by an impurity level
from extra atomic phosphorus. Our findings provide insights into the electronic
transitions of CrPS4 and their connection to its intrinsic magnetic properties.

8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph