修改第一段

This commit is contained in:
2025-12-25 12:23:05 +08:00
parent 2b32c52d60
commit 8b269d067e
2 changed files with 24 additions and 19 deletions

View File

@@ -89,4 +89,6 @@ This was confirmed by the results under different polarization configurations an
对齐正入射、xyyx 使用 E23 对齐,其它则无法对齐,看情况处理。 对齐正入射、xyyx 使用 E23 对齐,其它则无法对齐,看情况处理。
只考虑了沿 zOx 平面入射的情况。
#include "figure-e1.typ" #include "figure-e1.typ"

View File

@@ -2,26 +2,29 @@
// 第一段:弱极性与强极性声子模式表现截然不同。如图所示,弱极性声子模式几乎不依赖于波矢方向,而强极性声子模式则表现出显著的各向异性。 // 第一段:弱极性与强极性声子模式表现截然不同。如图所示,弱极性声子模式几乎不依赖于波矢方向,而强极性声子模式则表现出显著的各向异性。
Owing to the distinct behaviors arising from different electrical polarities of Raman-active phonon modes, Raman-active phonon modes were categorized into two groups,
they were categorized into two groups: according to the distinct behaviors arising from different electrical polarities,
negligible-polarity phonons (i.e., having zero or very weak electrical polarity), including eight negligible-polarity modes (i.e., having zero or very weak electrical polarity),
and strong-polarity phonons. and three strong-polarity modes.
The negligible-polarity phonons exhibited minimal dependence on the wavevector direction The negligible-polarity modes exhibited minimal dependence on the wavevector direction,
(see the intersection of gray solid lines and orange dashed lines in @figure-discont b and c, while the strong-polarity modes showed significant anisotropy.
where the frequency only differed #sym.tilde 0.1 cm#super[-1] across different incidence configurations), This distinction was clearly illustrated in @figure-discont,
and were therefore usually analyzed at the #sym.Gamma point regardless of the incidence configurations; where the phonon dispersion relations of negligible-polarity modes (gray solid lines)
specifically, there were eight such modes were roughly continuous and flat at the #sym.Gamma point,
labeled A#sub[1]-1 to A#sub[1]-2, E#sub[1]-1 to E#sub[1]-2, and E#sub[2]-1 to E#sub[2]-4, leading to only #sym.tilde 0.1 cm#super[-1] frequency variations and similar vibration patterns
according to their irreducible representations in the C#sub[6v] group and in order of increasing frequency. across different incidence configurations.
In contrast, the strong-polarity phonons displayed significant anisotropy In contrast, the strong-polarity modes (colored solid lines) displayed discontinuities at the #sym.Gamma point,
(see the intersection of colored solid lines and orange dashed lines in @figure-discont b and c, resulting in #sym.tilde 1 cm#super[-1] frequency shifts and distinct different vibration patterns
where the frequency differed #sym.tilde 10 cm#super[-1] across different incidence configurations), under different incidence configurations.
and required analysis under specific incidence configurations. Consequently, the negligible-polarity modes were named
In this paper, we focused on incidence within the zOx plane, according to their irreducible representations at the #sym.Gamma point and in order of increasing frequency,
where three modes were present and named according to their vibration directions: including A#sub[1]-1 to A#sub[1]-2, E#sub[1]-1 to E#sub[1]-2, and E#sub[2]-1 to E#sub[2]-4.
TO-zOx (vibrating in the zOx plane and roughly perpendicular to the incidence direction), In contrast, the strong-polarity modes were named according to their vibration directions and incidence configurations,
including TO-zOx (vibrating in the zOx plane and roughly perpendicular to the incidence direction),
TO-y (vibrating along the y-axis), and LO (vibrating roughly parallel to the incidence direction). TO-y (vibrating along the y-axis), and LO (vibrating roughly parallel to the incidence direction).
#include "figure-discont.typ"
In order to further investigate the frequencies dependence on the wavevector, In order to further investigate the frequencies dependence on the wavevector,
and to confirm the accuracy of both our experiments and calculations, and to confirm the accuracy of both our experiments and calculations,
we analyzed the negligible-polarity phonons off the #sym.Gamma point we analyzed the negligible-polarity phonons off the #sym.Gamma point
@@ -36,7 +39,7 @@ The E#sub[2]-3 peak served as a calibration reference under various experiments,
=== Negligible-polarity Phonons === Negligible-polarity Phonons
#include "figure-discont.typ"
#include "figure-raman.typ" #include "figure-raman.typ"
Peaks corresponding to seven Raman-active negligible-polarity phonons were observed in our experiments Peaks corresponding to seven Raman-active negligible-polarity phonons were observed in our experiments