Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural evolution and skyrmionic phase diagram of the lacunar spinel
  GaMo$_4$Se$_8$   In the $AB_4Q_8$ lacunar spinels, the electronic structure is described on
the basis of inter- and intra-cluster interactions of tetrahedral $B_4$
clusters, and tuning these can lead to myriad fascinating electronic and
magnetic ground states. In this work, we employ magnetic measurements,
synchrotron X-ray and neutron scattering, and first-principles electronic
structure calculations to examine the coupling between structural and magnetic
phase evolution in GaMo$_4$Se$_8$, including the emergence of a skyrmionic
regime in the magnetic phase diagram. We show that the competition between two
distinct Jahn-Teller distortions of the room temperature cubic
$F\overline{4}3m$ structure leads to the coexistence of the ground state $R3m$
phase and a metastable $Imm2$ phase. The magnetic properties of these two
phases are computationally shown to be very different, with the $Imm2$ phase
exhibiting uniaxial ferromagnetism and the $R3m$ phase hosting a complex
magnetic phase diagram including equilibrium N\'eel--type skyrmions stable from
nearly $T$ = 28 K down to $T$ = 2 K, the lowest measured temperature. The large
change in magnetic behavior induced by a small structural distortion reveals
that GaMo$_4$Se$_8$ is an exciting candidate material for tuning unconventional
magnetic properties $via$ mechanical means.

22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga