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Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene

Author

Listed:
  • Dong-Ho Kang

    (Nanyang Technological University)

  • Hao Sun

    (Nanyang Technological University)

  • Manlin Luo

    (Nanyang Technological University)

  • Kunze Lu

    (Nanyang Technological University)

  • Melvina Chen

    (Nanyang Technological University)

  • Youngmin Kim

    (Nanyang Technological University)

  • Yongduck Jung

    (Nanyang Technological University)

  • Xuejiao Gao

    (Nanyang Technological University)

  • Samuel Jior Parluhutan

    (Nanyang Technological University)

  • Junyu Ge

    (Nanyang Technological University)

  • See Wee Koh

    (Nanyang Technological University)

  • David Giovanni

    (Nanyang Technological University)

  • Tze Chien Sum

    (Nanyang Technological University)

  • Qi Jie Wang

    (Nanyang Technological University
    Nanyang Technological University)

  • Hong Li

    (Nanyang Technological University)

  • Donguk Nam

    (Nanyang Technological University)

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 laboratory 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.

Suggested Citation

  • Dong-Ho Kang & Hao Sun & Manlin Luo & Kunze Lu & Melvina Chen & Youngmin Kim & Yongduck Jung & Xuejiao Gao & Samuel Jior Parluhutan & Junyu Ge & See Wee Koh & David Giovanni & Tze Chien Sum & Qi Jie W, 2021. "Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25304-0
    DOI: 10.1038/s41467-021-25304-0
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    Cited by:

    1. Kunze Lu & Manlin Luo & Weibo Gao & Qi Jie Wang & Hao Sun & Donguk Nam, 2023. "Strong second-harmonic generation by sublattice polarization in non-uniformly strained monolayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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