Spin Dynamics Modulated by Rashba States in Ferroelectric α-GeTe-Reference-Cited by-同舟云学术

Spin Dynamics Modulated by Rashba States in Ferroelectric α-GeTe

Published:2022-12-21 Issue: Volume: Page:
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Author:

Cheng Zhao-Hua¹^ORCID,Yang Xu²,Qiu Liang³,Xue Hao-pu⁴,Tang Jin⁵,Du Haifeng⁶^ORCID,Sun Rui⁴,Yang Qing-lin⁴,Liu Jia-nan⁴,Wei Yan-sheng⁴,Zhang Xiang-Qun²,He Wei²,Hou Yusheng⁷^ORCID

Affiliation:

1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

2. State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

3. Center for Neutron Science and Technology, School of Physics, Sun Yat-Sen University, Guangzhou, 510275, China;

4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;

5. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences, and University of Science and Technology of China,

6. High Magnetic Field Laboratory, Chinese Academy of Sciences

7. Sun Yat-Sen University

Abstract

Abstract Ferroelectric Rashba semiconductor α-GeTe provides a promising arena in spintronics due to its large bulk and surface Rashba. Since most surface Rashba bands are located above Fermi level, the spin dynamics are mainly dominated by bulk states. Whether the surface states of α-GeTe can modulate the spin dynamics or not is an open question. Here, we report the manipulation of magnetic damping by the surface states of α-GeTe via ferromagnetic resonance (FMR) and theory calculation. The surface states located near the Fermi level of α-GeTe is realized by doping Bi atoms and revealed by angle-resolved photoemission spectroscopy (ARPES). Moreover, the magnitude of magnetic damping is related to the density of states near Fermi surfaces of Ge1 − xBixTe. Our work improves the understanding of the magnetic damping influenced by different part of Rashba bands and gives a platform for the research of α-GeTe in Rashba effect and the spintronics.

Publisher

Research Square Platform LLC

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