Origin of high-density two-dimensional electron gas in ZnO/ZnMgO heterostructures.

@inproceedings{Sasa2007OriginOH,
  title={Origin of high-density two-dimensional electron gas in ZnO/ZnMgO heterostructures.},
  author={Shigehiko Sasa and Tetsuya Tamaki and Kazuyuki Hashimoto and Kazuya Fujimoto and Kazuto Koike and Mitsuaki Yano and Masataka Inoue},
  year={2007}
}
Numerical calculations are performed for determining the polarization charge density a and residual donor concentrations in ZnO/ZnMgO heterostructures. The a value is determined to be 10 mC/m2 for explaining the cathodoluminescence (CL) peak positions in narrow ZnO/ZnMgO multiple-quantum-well (MQW) structures (≤ 4 nm), and is consistent to those obtained from the two-dimensional electron gas (2DEG) density formed in single-hetero and single-quantum-well structures. A significantly high residual… CONTINUE READING

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