  Spin-phonon interaction plays an important role in 2D magnetic materials and
motivates the development of next-generation spin- and charge-dependent
microelectronic devices. Understanding the spin-phonon interaction by tuning
the growth parameter of single crystal Cr$_2Te_3$, a robust quasi-2D room
temperature magnetic material, is crucial for spintronic devices. The synthesis
of single crystal 2D Cr$_2Te_3$ flakes on a Si substrate from co-deposited thin
film by plasma annealing techniques is a significant achievement. The
temperature dependence and polarization-resolved Raman spectroscopy with
support of density functional theory classified lattice symmetry operations
were used to identify the phonon modes to investigate the spin/electron-phonon
interactions in Cr$_2Te_3$. The mean-field theory model in single crystal
Cr$_2Te_3$ is employed to quantify the spin-phonon interaction and correlate
with in-plane and out-of-plane magnetic behavior. The observation of a positive
correlation between phonon mode frequency and spin-phonon interaction strength
in single crystal Cr$_2Te_3$ can be a potential candidate for spintronic
applications.
