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Title: Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene
Authors: Kang, Dong-Ho
Sun, Hao
Luo, Manlin
Lu, Kunze
Chen, Melvina
Kim, Youngmin
Jung, Yongduck
Gao, Xuejiao
Parluhutan, Samuel Jior
Ge, Junyu
Koh, See Wee
Giovanni, David
Sum, Tze Chien
Wang, Qi Jie
Li, Hong
Nam, Donguk
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2021
Source: Kang, D., Sun, H., Luo, M., Lu, K., Chen, M., Kim, Y., Jung, Y., Gao, X., Parluhutan, S. J., Ge, J., Koh, S. W., Giovanni, D., Sum, T. C., Wang, Q. J., Li, H. & Nam, D. (2021). Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene. Nature Communications, 12, 5087-.
Project: 2019-T1-002-050 (RG 148/19 (S)
MOE2018-T2-2-011 (S)
MOE2018-T2-1- 176
Journal: Nature Communications
Abstract: The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to investigate intriguing physical phenomena that would be unattainable with labora- tory superconducting magnets. The giant pseudo-magnetic fields observed in highly deformed graphene can substantially alter the optical properties of graphene beyond a level that can be feasible with an external magnetic field, but the experimental signatures of the influence of such pseudo-magnetic fields have yet to be unveiled. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence for slow carrier dynamics enabled by the pseudo-magnetic fields in periodically strained graphene. Strong pseudo-magnetic fields of ~100 T created by non-uniform strain in graphene on nanopillars are found to significantly decelerate the relaxation processes of hot carriers by more than an order of magnitude. Our findings offer alternative opportunities to harness the properties of graphene enabled by pseudo-magnetic fields for optoelectronics and condensed matter physics.
ISSN: 2041-1723
DOI: 10.1038/s41467-021-25304-0
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
School of Mechanical and Aerospace Engineering 
Rights: © 2021 The Author(s). 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 licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
MAE Journal Articles
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