paper/result/perfect/default.typ

@@ -6,17 +6,17 @@
 在我们的实验（绿光）中，参与拉曼散射的声子都位于 Gamma 点附近（距离仅 xxx 埃），而与 Gamma 点的相对方向则根据入射配置而定。
 对于正入射，声子大致位于 Gamma-A 线上；对于边入射，声子大致位于 Gamma-K 线上。对于掠入射，声子不位于任何高对称线上。
 
-Properties of phonons depend on their positions in reciprocal space (i.e., wavevectors),
+The properties of phonons depend on their positions in reciprocal space (i.e., their wavevectors),
   and the wavevectors of phonons participating in a Raman scattering process
   are determined by the Raman experiment configuration.
 In our experiments (back-scattering with 532 nm laser light),
-  phonons involved in Raman scattering are all located near the #sym.Gamma point
-    (about $5.13 times 10^(-3) angstrom$ from the #sym.Gamma point),
-  and their relative directions from the #sym.Gamma point depend on the incidence configurations.
+  the phonons involved are located very close to the #sym.Gamma point (approximately $5.13 times 10^(-3) angstrom$),
+  and direction relative to the #sym.Gamma point is determined by the incidence configurations.
 For normal and edge incidence,
-  phonons participating in Raman process are approximately located along the #sym.Gamma–A and #sym.Gamma–K lines,
-  respectively, as illustrated in @figure-discont.
-For grazing incidence, phonons are not located on any high-symmetry lines, and not shown in the figure.
+  the relevant phonons lie approximately along the #sym.Gamma–A and #sym.Gamma–K lines, respectively,
+  as illustrated in @figure-discont.
+For grazing incidence,
+  the relevant phonons do not reside on any high-symmetry lines and are therefore not depicted in the figure.
 
 #include "figure-discont.typ"
 
@@ -26,41 +26,17 @@ For grazing incidence, phonons are not located on any high-symmetry lines, and n
 我们将这 21 个声子模式分为两类：18 个极性可以忽略的声子模式（即极性为零或非常弱的声子），在拉曼散射过程中它们的电极性造成的效应可以忽略；
   和 3 个强极性声子模式，在拉曼光谱中电极性效应是可观测的。
 
-Phonons involved in Raman scattering under different incidence configurations (normal, grazing, and edge incidence)
-    are located at distinct positions in reciprocal space,
-  all close to the #sym.Gamma point.
-The distance from the #sym.Gamma point is determined by the wavelength of the incident light,
-  and the direction from the #sym.Gamma point is determined by the incidence configurations.
 At each such position near the #sym.Gamma point,
   there exist 21 phonon modes (with degeneracies counted accordingly).
-These modes can be categorized into two groups:
+These modes were categorized into two groups according to their electrical polarities:
   18 negligible-polar phonons (i.e., zero or very weak electrical polarity),
-    whose electrical polarity can be disregarded in the Raman scattering process;
+    in which same species atoms vibrate in opposite directions and the electrical cancellated with each other,
+    leading to negligible electrical polarity during Raman scattering process,
+    shown as gray lines in @figure-discont;
   and three strong-polar phonons,
-    whose electrical polarity leads to observable effects in the Raman spectra.
-
-这个分类是有意义的。从微观上讲，它也和原子的振动方向有关。
-
-这个分类基于这样的事实：
-  在 4H-SiC 的原胞中，四个 Si 原子携带类似的正的 Born 有效电荷（BEC），
-  而四个 C 原子携带类似的负的 BEC（见 @table-bec）。
-在 18 个弱极性声子中，
-  两个 Si 原子的振动方向大致与另外两个 Si 原子相反，
-  C 原子也是如此，
-  导致宏观极性的抵消。
-
-This classification is based on the fact that
-  the four Si atoms in the primitive cell of 4H-SiC carry similar positive Born effective charges (BECs),
-  and the four C atoms carry similar negative BECs (see @table-bec).
-In the 18 negligible-polar phonons,
-  the vibrations of two Si atoms are approximately opposite to those of the other two Si atoms,
-  and the same holds for the C atoms,
-  leading to cancellations of macroscopic polarity.
-In contrast, in the three strong-polar phonons,
-  all Si atoms vibrate in the same direction, and all the C atoms vibrate in the opposite direction,
-  resulting in a strong dipole moment.
-
-#include "table-bec.typ"
+    in which all atoms of the same species vibrate in the same direction,
+    resulting in a strong dipole moment and observable electrical polarity in Raman spectra,
+    shown as colored lines in @figure-discont.
 
 #include "non-polar/default.typ"
 #include "polar/default.typ"

paper/result/perfect/table-bec.typ

@@ -1,13 +0,0 @@
-#figure({
-  set text(size: 9pt);
-  set par(justify: false);
-  table(columns: 4, align: center + horizon,
-    table.cell(colspan: 2, rowspan: 2)[], table.cell(colspan: 2)[BEC (unit: |e|)], [x / y direction], [z direction],
-    table.cell(rowspan: 2)[Si atom], [A/C layer], [2.667], [2.626], [B layer], [2.674], [2.903],
-    table.cell(rowspan: 2)[C atom], [A/C layer], [-2.693], [-2.730], [B layer], [-2.648], [-2.800],
-  )},
-  caption: [
-    Born effective charges of Si and C atoms in A/B/C/B layers of 4H-SiC, calculated using first principle method.
-  ],
-  placement: none,
-)<table-bec>