High mobility of the strongly confined hole gas in AgTaO3/SrTiO3

  • S. Nazir
    KAUST, Physical Science and Engineering Division , Thuwal 23955-6900, Kingdom of Saudi Arabia
  • M. Upadhyay Kahaly
    KAUST, Physical Science and Engineering Division , Thuwal 23955-6900, Kingdom of Saudi Arabia
  • U. Schwingenschlögl
    KAUST, Physical Science and Engineering Division , Thuwal 23955-6900, Kingdom of Saudi Arabia

書誌事項

公開日
2012-05-14
DOI
  • 10.1063/1.4719106
公開者
AIP Publishing

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説明

<jats:p>A theoretical study of the two-dimensional hole gas at the (AgO)−/(TiO2)0 p-type interface in the AgTaO3/SrTiO3 (001) heterostructure is presented. The Ag 4d states strongly hybridize with the O 2p states and contribute to the hole gas. It is demonstrated that the holes are confined to an ultra thin layer (∼4.9Å) with a considerable carrier density of ∼1014cm-2. We estimate a hole mobility of 18.6 cm2 V−1 s−1, which is high enough to enable device applications.</jats:p>

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