Quantum oscillations of the two-dimensional hole gas at atomically flat diamond surfaces

Yamaguchi Takahide, Hiroyuki Okazaki, Keita Deguchi, Shinya Uji, Hiroyuki Takeya, Yoshihiko Takano, Hidetoshi Tsuboi, Hiroshi Kawarada

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Shubnikov-de Haas oscillations are observed in atomically flat hydrogen-terminated diamond surfaces with high-density hole carriers introduced by the electric field effect using an ionic liquid. The Shubnikov-de Haas oscillations depend only on the magnetic field component perpendicular to the diamond surface, thus providing evidence of two-dimensional Fermi surfaces. The effective masses estimated from the temperature dependence of the oscillations are close to the cyclotron effective masses of the valence band maxima in diamond. The estimated quantum scattering time is one order of magnitude longer than the transport scattering time and indicates that the carrier mobility is locally as high as several thousand cm2/V s at low temperature.

    Original languageEnglish
    Article number235304
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume89
    Issue number23
    DOIs
    Publication statusPublished - 2014 Jun 4

    Fingerprint

    Diamond
    Diamonds
    Gases
    diamonds
    oscillations
    gases
    Scattering
    Electric field effects
    Ionic Liquids
    Fermi surface
    Carrier mobility
    Cyclotrons
    Valence bands
    carrier mobility
    scattering
    Ionic liquids
    Fermi surfaces
    cyclotrons
    Hydrogen
    Magnetic fields

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Quantum oscillations of the two-dimensional hole gas at atomically flat diamond surfaces. / Takahide, Yamaguchi; Okazaki, Hiroyuki; Deguchi, Keita; Uji, Shinya; Takeya, Hiroyuki; Takano, Yoshihiko; Tsuboi, Hidetoshi; Kawarada, Hiroshi.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 23, 235304, 04.06.2014.

    Research output: Contribution to journalArticle

    Takahide, Yamaguchi ; Okazaki, Hiroyuki ; Deguchi, Keita ; Uji, Shinya ; Takeya, Hiroyuki ; Takano, Yoshihiko ; Tsuboi, Hidetoshi ; Kawarada, Hiroshi. / Quantum oscillations of the two-dimensional hole gas at atomically flat diamond surfaces. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 89, No. 23.
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    AU - Deguchi, Keita

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    AU - Takeya, Hiroyuki

    AU - Takano, Yoshihiko

    AU - Tsuboi, Hidetoshi

    AU - Kawarada, Hiroshi

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