Observation of cyclotron resonance in twisted bilayer graphene

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20345
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Onodera Momoko 東京大学, 生産技術研究所, 特任助教 (10907819)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: グラフェン / 二次元層状物質 / 中赤外光応答

Outline of Final Research Achievements

We fabricated twisted graphene (tBLG) devices and measured photo response of the devices at low temperatures and under high magnetic field. Mid-infrared light was irradiated to the device through optical fiber from the CO2 laser source. We observed unique photo voltage signals due to cyclotron resonance absorption in the tBLG device with a twist angle of 2.0 deg. We will further investigate the angle dependence of the signals in the future.

Free Research Field

二次元材料

Academic Significance and Societal Importance of the Research Achievements

本成果はツイスト二層グラフェンにおけるサイクロトロン共鳴吸収実験として世界初のものであり、学術的に非常に大きな意味を持つ。今だ未解明であるツイスト二層グラフェンのランダウ準位解明に向けて大きな一歩となる。