High carrier mobility in ultrapure diamond measured by time-resolved cyclotron resonance
作者：
DOI: 10.1063/1.4891039
关键词: Cyclotron resonance 、 Diamond 、 Phonon scattering 、 Electron mobility 、 Relaxation (NMR) 、 Chemistry 、 Atomic physics 、 Scattering 、 Analytical chemistry 、 Impurity 、 Electron
摘要: We have performed time-resolved cyclotron resonance measurements in ultrapure diamond crystals for the temperature range of T = 7.3 – 40 K and obtained temperature-dependent momentum relaxation times based on widths optically generated electrons holes. The time follows a − 3 / 2 law down to 12 K, which is expected acoustic-phonon scattering without impurity effect because high purity our samples. deviation from at lower temperatures explained by breakdown high-temperature approximation phonon scattering. extract carrier drift mobility using directly measured effective masses times. 10 600 ns delay after optical injection found be μ e 1.5 × 6 cm V s electrons, l h 2.3 2.4 5 light heavy holes, respectively. These values are achieved high-sensitivity detection low-density carriers (at <1011 cm−3) free carrier-carrier as well suppression high-purity
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