Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent progress on the characterization of the high-pressure behaviour
  of AVO4 orthovanadates   AVO4 vanadates are materials of technological importance due to their variety
of functional properties. They have applications as scintillators,
thermophosphors, photocatalysts, cathodoluminescence, and laser-host materials.
Studies at HP-HT are helpful for understanding the physical properties of the
solid state, in special, the phase behavior of AVO4 materials. For instance,
they have contributed to understand the macroscopic properties of vanadates in
terms of microscopic mechanisms. A great progress has been made in the last
decade towards the study of the pressure-effects on the structural,
vibrational, and electronic properties of AVO4 compounds. Thanks to the
combination of experimental and theoretical studies, novel metastable phases
with interesting physical properties have been discovered and the HP structural
sequence followed by AVO4 oxides has been understood. Here, we will review HP
studies carried out on the phase behavior of different AVO4 compounds. The
studied materials include rare-earth vanadates and other compounds; for
example, BiVO4, FeVO4, CrVO4, and InVO4. In particular, we will focus on
discussing the results obtained by different research groups, who have
extensively studied vanadates up to pressures exceeding 50 GPa. We will make a
systematic presentation and discussion of the results reported in the
literature. In addition, with the aim of contributing to the improvement of the
actual understanding of the high-pressure properties of ternary oxides, the HP
behavior of vanadates will be compared with related compounds; including
phosphates, chromates, and arsenates. The behavior of nanomaterials under
compression will also be briefly described and compared with their bulk
counterpart. Finally, the implications of the reported studies on technological
developments and geophysics will be commented and possible directions for the
future studies will be proposed.

37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc