Phonon dichroism in proximitized graphene

doi:10.1088/1674-1056/acf207

中国物理B ›› 2023, Vol. 32 ›› Issue (10): 106301-106301.doi: 10.1088/1674-1056/acf207

Phonon dichroism in proximitized graphene

Wen-Yu Shan(单文语)^†

Department of Physics, School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China

收稿日期:2023-06-06 修回日期:2023-08-06 接受日期:2023-08-21 出版日期:2023-09-21 发布日期:2023-09-22
通讯作者: Wen-Yu Shan E-mail:wyshan@gzhu.edu.cn
基金资助:
This work is supported by the National Natural Science Foundation of China (Grant No. 11904062), the Starting Research Fund from Guangzhou University (Grant No. RQ2020076), and Guangzhou Basic Research Program, jointed funded by Guangzhou University (Grant No. 202201020186).

Phonon dichroism in proximitized graphene

Wen-Yu Shan(单文语)^†

Department of Physics, School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China

Received:2023-06-06 Revised:2023-08-06 Accepted:2023-08-21 Online:2023-09-21 Published:2023-09-22
Contact: Wen-Yu Shan E-mail:wyshan@gzhu.edu.cn
Supported by:
This work is supported by the National Natural Science Foundation of China (Grant No. 11904062), the Starting Research Fund from Guangzhou University (Grant No. RQ2020076), and Guangzhou Basic Research Program, jointed funded by Guangzhou University (Grant No. 202201020186).

摘要/Abstract

摘要： We systematically investigate the phonon dichroism in proximitized graphene with broken time-reversal symmetry. We find that in the absence of any type of spin-orbit coupling, phonon dichroism vanishes. Linear and circular phonon dichroism occur in the presence of uniform (staggered) intrinsic spin-orbit coupling and ferromagnetic (antiferromagnetic) exchange coupling. All these situations can be distinguished by their specific behaviors of phonon absorption at the transition point. Our finding provides new possibilities to use phonon dichroism to identify the form of spin-orbit coupling and exchange coupling in proximitized graphene on various magnetic substrates.

关键词: phonon dichroism, spin-orbit coupling, proximitized graphene, electron-phonon interaction

Abstract: We systematically investigate the phonon dichroism in proximitized graphene with broken time-reversal symmetry. We find that in the absence of any type of spin-orbit coupling, phonon dichroism vanishes. Linear and circular phonon dichroism occur in the presence of uniform (staggered) intrinsic spin-orbit coupling and ferromagnetic (antiferromagnetic) exchange coupling. All these situations can be distinguished by their specific behaviors of phonon absorption at the transition point. Our finding provides new possibilities to use phonon dichroism to identify the form of spin-orbit coupling and exchange coupling in proximitized graphene on various magnetic substrates.

Key words: phonon dichroism, spin-orbit coupling, proximitized graphene, electron-phonon interaction

中图分类号: (Phonons in graphene)

63.22.Rc

71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 63.20.kd (Phonon-electron interactions) 73.43.-f (Quantum Hall effects)

Wen-Yu Shan(单文语). Phonon dichroism in proximitized graphene[J]. 中国物理B, 2023, 32(10): 106301-106301.

Wen-Yu Shan(单文语). Phonon dichroism in proximitized graphene[J]. Chin. Phys. B, 2023, 32(10): 106301-106301.

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Phonon dichroism in proximitized graphene

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