Cargando…
Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2)
Van der Waals interactions with transition metal dichalcogenides were shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities of the SOC. Here, we probe SOC-driven band splitting and e...
Autores principales: | , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10542375/ https://www.ncbi.nlm.nih.gov/pubmed/37777513 http://dx.doi.org/10.1038/s41467-023-41826-1 |
_version_ | 1785114082515353600 |
---|---|
author | Rao, Qing Kang, Wun-Hao Xue, Hongxia Ye, Ziqing Feng, Xuemeng Watanabe, Kenji Taniguchi, Takashi Wang, Ning Liu, Ming-Hao Ki, Dong-Keun |
author_facet | Rao, Qing Kang, Wun-Hao Xue, Hongxia Ye, Ziqing Feng, Xuemeng Watanabe, Kenji Taniguchi, Takashi Wang, Ning Liu, Ming-Hao Ki, Dong-Keun |
author_sort | Rao, Qing |
collection | PubMed |
description | Van der Waals interactions with transition metal dichalcogenides were shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities of the SOC. Here, we probe SOC-driven band splitting and electron dynamics in graphene on WSe(2) by measuring ballistic transverse magnetic focusing. We found a clear splitting in the first focusing peak whose evolution in charge density and magnetic field is well reproduced by calculations using the SOC strength of ~ 13 meV, and no splitting in the second peak that indicates stronger Rashba SOC. Possible suppression of electron-electron scatterings was found in temperature dependence measurement. Further, we found that Shubnikov-de Haas oscillations exhibit a weaker band splitting, suggesting that it probes different electron dynamics, calling for a new theory. Our study demonstrates an interesting possibility to exploit ballistic electron motion pronounced in graphene for emerging spin-orbitronics. |
format | Online Article Text |
id | pubmed-10542375 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-105423752023-10-03 Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) Rao, Qing Kang, Wun-Hao Xue, Hongxia Ye, Ziqing Feng, Xuemeng Watanabe, Kenji Taniguchi, Takashi Wang, Ning Liu, Ming-Hao Ki, Dong-Keun Nat Commun Article Van der Waals interactions with transition metal dichalcogenides were shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities of the SOC. Here, we probe SOC-driven band splitting and electron dynamics in graphene on WSe(2) by measuring ballistic transverse magnetic focusing. We found a clear splitting in the first focusing peak whose evolution in charge density and magnetic field is well reproduced by calculations using the SOC strength of ~ 13 meV, and no splitting in the second peak that indicates stronger Rashba SOC. Possible suppression of electron-electron scatterings was found in temperature dependence measurement. Further, we found that Shubnikov-de Haas oscillations exhibit a weaker band splitting, suggesting that it probes different electron dynamics, calling for a new theory. Our study demonstrates an interesting possibility to exploit ballistic electron motion pronounced in graphene for emerging spin-orbitronics. Nature Publishing Group UK 2023-09-30 /pmc/articles/PMC10542375/ /pubmed/37777513 http://dx.doi.org/10.1038/s41467-023-41826-1 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Rao, Qing Kang, Wun-Hao Xue, Hongxia Ye, Ziqing Feng, Xuemeng Watanabe, Kenji Taniguchi, Takashi Wang, Ning Liu, Ming-Hao Ki, Dong-Keun Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title | Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title_full | Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title_fullStr | Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title_full_unstemmed | Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title_short | Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe(2) |
title_sort | ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on wse(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10542375/ https://www.ncbi.nlm.nih.gov/pubmed/37777513 http://dx.doi.org/10.1038/s41467-023-41826-1 |
work_keys_str_mv | AT raoqing ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT kangwunhao ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT xuehongxia ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT yeziqing ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT fengxuemeng ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT watanabekenji ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT taniguchitakashi ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT wangning ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT liuminghao ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 AT kidongkeun ballistictransportspectroscopyofspinorbitcoupledbandsinmonolayergrapheneonwse2 |