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

doi:10.1103/PhysRevB.89.235304

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 journal › Article › peer-review

30 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 language	English
Article number	235304
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.89.235304
Publication status	Published - 2014 Jun 4

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.89.235304

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title = "Quantum oscillations of the two-dimensional hole gas at atomically flat diamond surfaces",

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.",

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AU - Takahide, Yamaguchi

AU - Okazaki, Hiroyuki

AU - Deguchi, Keita

AU - Uji, Shinya

AU - Takeya, Hiroyuki

AU - Takano, Yoshihiko

AU - Tsuboi, Hidetoshi

AU - Kawarada, Hiroshi

PY - 2014/6/4

Y1 - 2014/6/4

N2 - 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.

AB - 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.

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

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