Spatial distribution of two-dimensional electron gas in a ZnO/Mg_0.2_Zn_0.8_O heterostructure probed with a conducting polymer Schottky contact

• 中野 匡規

• Nakano Masaki

• 塚崎 敦

• Tsukazaki Atsushi

• 上野 和紀

• Ueno Kazunori

• 郡司 遼佑

• Gunji Ryosuke Y.

• 大友 明

• Ohtomo Akira

• 福村 知昭

• Fukumura Tomoteru

• 川崎 雅司

• Kawasaki Masashi

抄録

A ZnO/Mg_0.2Zn_0.8O heterostructure was characterized at T=2 K through capacitance measurements with using a conducting polymer, poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS), as a Schottky contact. The Nyquist diagram, which is the trajectory curve of the complex impedance vector, appeared to be an excellent semicircular shape, implying that the PEDOT:PSS/ZnO/Mg_0.2Zn_0.8O junction can be described with an equivalent single RC parallel circuit. Capacitance-voltage characteristics elucidate the existence of a two-dimensional electron gas, where 10¹⁹ cm^-3 electrons are confined within 5 nm at the ZnO/Mg_0.2Zn_0.8O heterointerface.

収録刊行物

• Applied Physics Letters

  Applied Physics Letters 96 (5), 2010-02

詳細情報

• CRID: 1570572702841876096
• NII論文ID: 120006582027
• ISSN: 00036951
• Web Site: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100608897
• 本文言語コード: en
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