test-typst/section/perfect/non-polar/default.typ

@@ -37,18 +37,15 @@ However, whether a mode is sufficiently strong to be experimentally visible
 
 // TODO: maybe it is better to assign Raman tensor to each bond, instead of atom
 
-We propose a method to estimate the magnitudes of the Raman tensors of these phonons by symmetry analysis.
-This method relies on the following two assumptions:
-firstly, the change of polarizability caused by the movement of the atom in different locations
-  is mainly determined by its first- and second-nearest neighbors,
-  and the farther neighbors have relatively small contributions.
-Secondly, the change of polarizability caused by Si atom and C atom is roughly connected by the reversal of the charge,
-  other factors (mass, bond length, etc.) contribute only a small value.
-Therefore, the vibration mode with the most intense Raman intensity
-    could be estimated before the first-principle calculation and experiment,
-  and the Raman tensors of the calculated phonon modes could also be estimated
-    without further first-principle calculations.
-Please see appendix for details.
+We propose a method to estimate the magnitudes of the Raman tensors of these phonons based on symmetry analysis.
+This approach is founded on the assumption that the change in polarizability induced by atomic displacements in 4H-SiC
+  is mainly determined by two factors: first- and second-nearest neighbors of the atom, and the symbol of charge corresponding to the atom,
+  all other factors (mass, bond length, etc.) contribute only a small value.
+Consequently,
+  the phonon modes with the strongest Raman intensities can be predicted
+    prior to first-principles calculations and experiments,
+  and the Raman tensors of the calculated phonon modes can be estimated without additional first-principles computations.
+Further details are provided in the appendix.
 
 The Raman tensors and frequencies of the negligible-polar phonons were calculated using first-principles methods,
   and the results are compared with experiment and theory (@table-nopol).