Visualizing electron-phonon and anharmonic phonon-phonon coupling in the kagome ferrimagnet GdMn6Sn6

被引：4

作者：

Liu, Yibing ^{[1
,2
]}

Han, Yadong ^{[1
,2
]}

Yu, Junhong ^{[1
]}

Zhang, Hang ^{[1
,2
]}

Yin, Qiangwei ^{[3
,4
]}

Lei, Hechang ^{[3
,4
]}

Hu, Jianbo ^{[1
,2
]}

Zhang, Dayong ^{[1
]}

机构：

[1] China Acad Engn Phys, Inst Fluid Phys, Lab Shock Wave & Detonat Phys, Mianyang 621900, Peoples R China

[2] Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China

[3] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[4] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano De, Beijing 100872, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2023年 / 122卷 / 25期

关键词：

MAGNETIC-PROPERTIES; RMN6SN6; R; FREQUENCY; DYNAMICS; ER;

D O I：

10.1063/5.0152116

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Kagome magnet RMn6Sn6 (R = Gd-Tm, Lu) with unusual lattice geometry and breaking of time-reversal symmetry is a promising platform to investigate the interaction of topology and magnetism. Since phonons play a vital role in the coupling between magnetism and topological fermions, a fundamental understanding of phonon dynamics is of great significance in this emerging research field. Here, we report a systematic investigation of ultrafast coherent phonon dynamics in GdMn6Sn6 crystals as a function of temperature and excitation fluence using time-resolved pump-probe spectroscopy. When the temperature decreases, the coherent phonon exhibits a hardening trend in frequency with a suppressed decay rate, which can be well-explained by the anharmonic scattering model. Unexpectedly, both the frequency and decay rate of coherent phonons are almost independent of excitation fluence, suggesting a weak electron-phonon scattering process in GdMn6Sn6.

引用

页数：7

共 57 条

[31] Low-Temperature Competing Magnetic Energy Scales in the Topological Ferrimagnet TbMn6Sn6 [J].