Journal of the Korean Physical Society

, Volume 74, Issue 2, pp 159–163 | Cite as

Terahertz Cyclotron Resonance in AlGaN/GaN Heterostructures

  • Dickson Kindole
  • Yasutaka ImanakaEmail author
  • Kanji Takehana
  • Liwen Sang
  • Masatomo Sumiya


Cyclotron resonance (CR) in AlGaN/GaN two-dimensional electron system is investigated under high magnetic fields up to 15 T in order to study the magnetic field dependence of the electron effective mass. Non-linear dependence of the CR energy against the magnetic field is observed, indicating that the electron effective mass becomes heavier with increasing the magnetic field. This is partially due to the contribution from the resonant polaron effect because GaN has a large electron-longitudinal-optical (LO) phonon interaction among III-V compounds. The magnetic field dependence of the CR energy is explained well with the Fr¨ohlich polaron theory in the magnetic field.


Cyclotron resonance GaN-heterostructures Polaron effect High magnetic field 


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Copyright information

© The Korean Physical Society 2019

Authors and Affiliations

  • Dickson Kindole
    • 1
    • 2
  • Yasutaka Imanaka
    • 1
    • 2
    Email author
  • Kanji Takehana
    • 3
  • Liwen Sang
    • 3
  • Masatomo Sumiya
    • 3
  1. 1.National Institute for Materials ScienceTsukuba, IbarakiJapan
  2. 2.Department of Condensed Matter PhysicsGraduate School of Science, Hokkaido University, SapporoHokkaidoJapan
  3. 3.National Institute for Materials ScienceTsukuba, IbarakiJapan

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