Qualitative Identification of the Spin-to-Orbital Conversion Mechanism Modulated by Rare-Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements

doi:10.1002/adfm.202411262

IMR OpenIR

	Qualitative Identification of the Spin-to-Orbital Conversion Mechanism Modulated by Rare-Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements
	Liu, Long 1; Jiang, Tianran 2; Zhao, Xiaotian 1; Chen, Ke 2; Lai, Tianshu 2; Liu, Wei 1; Zhang, Zhidong 1
通讯作者	Zhao, Xiaotian(xtzhao@imr.ac.cn) ; Lai, Tianshu(stslts@mail.sysu.edu.cn) ; Liu, Wei(wliu@imr.ac.cn)
	2024-09-19
发表期刊	ADVANCED FUNCTIONAL MATERIALS
ISSN	1616-301X
页码	8
摘要	It is crucial to study the materials that could effectively facilitate the inter-conversion between charge, spin, and orbital degrees of freedom. In this work, the conversion among these three types of degrees of freedom in Pt/CoFeB/rare-earth (RE, represents Nd, Gd, and Ho)/Ti multilayers is manipulated. Through terahertz (THz) emission measurements, it is found that the spin current induced by a femtosecond laser is converted into an orbital current via the spin-orbit coupling of the RE layer. Notably, the light RE (Nd) and heavy RE (Gd and Ho) induce the orbital current with opposite polarization directions, ultimately leading to a weakening or enhancement of the THz emission intensity, respectively. Moreover, the fast Fourier transform reveals that Gd exerts the most significant influence on increasing the whole THz spectrum within the Pt/CoFeB/RE/Ti structure. The findings of RE-modulated spin-to-orbital conversion provide valuable insights into the fundamental transport mechanism of the orbital current. In terahertz (THz) emission experiments, the spin-to-orbital-to-charge conversion process is modulated by utilizing the spin-orbit coupling of rare-earth (RE) metals Nd, Gd, and Ho. Depending on the type of RE metal, a tunable THz emission signal is observed in Pt/CoFeB/RE/Ti multilayer. This work offers insights into the inter-conversion mechanism between charge, spin, and orbital degrees of freedom. image
关键词	orbital current spin current spin-orbit coupling spin-to-orbital conversion terahertz
资助者	Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; Basic and Applied Basic Research Foundation of Guangdong Province ; Guangzhou Basic and Applied Basic Research Foundation ; IMR Innovation Fund
DOI	10.1002/adfm.202411262
收录类别	SCI
语种	英语
资助项目	Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China[52031014] ; National Natural Science Foundation of China[52301254] ; National Natural Science Foundation of China[52271193] ; National Natural Science Foundation of China[52171196] ; National Natural Science Foundation of China[12074441] ; National Natural Science Foundation of China[12304386] ; Basic and Applied Basic Research Foundation of Guangdong Province[2020A1515110192] ; Guangzhou Basic and Applied Basic Research Foundation[202102080414] ; IMR Innovation Fund[2023-PY02] ; [22hytd08]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001315067000001
出版者	WILEY-V C H VERLAG GMBH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190031
专题	中国科学院金属研究所
通讯作者	Zhao, Xiaotian; Lai, Tianshu; Liu, Wei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China
推荐引用方式 GB/T 7714	Liu, Long,Jiang, Tianran,Zhao, Xiaotian,et al. Qualitative Identification of the Spin-to-Orbital Conversion Mechanism Modulated by Rare-Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements[J]. ADVANCED FUNCTIONAL MATERIALS,2024:8.
APA	Liu, Long.,Jiang, Tianran.,Zhao, Xiaotian.,Chen, Ke.,Lai, Tianshu.,...&Zhang, Zhidong.(2024).Qualitative Identification of the Spin-to-Orbital Conversion Mechanism Modulated by Rare-Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements.ADVANCED FUNCTIONAL MATERIALS,8.
MLA	Liu, Long,et al."Qualitative Identification of the Spin-to-Orbital Conversion Mechanism Modulated by Rare-Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements".ADVANCED FUNCTIONAL MATERIALS (2024):8.