Valley filtering and valley-polarized collective modes in bulk graphene monolayers

doi:10.1088/1674-1056/acfd17

Abstract The presence of two sublattices in hexagonal graphene brings two energetically degenerate extremes in the conduction and valence bands, which are identified by the valley quantum number. Recently, this valley degree of freedom has been suggested to encode and process information, which develops a new carbon-based electronics named graphene valleytronics. In this topical review, we present and discuss valley-related transport properties in bulk graphene monolayers, which are due to strain-induced pseudomagnetic fields and associated vector potential, sublattice-stagger potential, and the valley-Zeeman effect. These valley-related interactions can be utilized to obtain valley filtering, valley spatial separation, valley-resolved guiding modes, and valley-polarized collective modes such as edge or surface plasmons. The present challenges and the perspectives on graphene valleytronics are also provided in this review.

Keywords: valleytronics graphene strain valley-Zeeman effect plasmons

Received: 04 June 2023
Revised: 21 September 2023
Accepted manuscript online: 26 September 2023

PACS:	72.80.Vp	(Electronic transport in graphene)
	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	73.43.Cd	(Theory and modeling)
	85.35.-p	(Nanoelectronic devices)

Fund: We express our sincere appreciation to our collaborators for their invaluable contributions to the related works presented in this review. This work is supported by the National Natural Science Foundation of China (Grant Nos. 11774314 and 12274370) and Scientific Research Start-up Fund of Zhejiang Normal University (Grant No. YS304222903).

Corresponding Authors: Feng Zhai
E-mail: fzhai@zjnu.cn

Cite this article:

Jian-Long Zheng(郑建龙) and Feng Zhai(翟峰) Valley filtering and valley-polarized collective modes in bulk graphene monolayers 2024 Chin. Phys. B 33 017203

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