Published September 2011
| public
Journal Article
Magnesium Doping Controlled Density and Mobility of Two-Dimensional Electron Gas in Mg_xZn_(1-x)O/ZnO Heterostructures
Abstract
The magnesium content in Mg_xZn_(1-x)O/ZnO heterostructures grown by molecular beam epitaxy enables the careful control of the carrier density of the two-dimensional electron system down to 5.6×10¹⁹ cm⁻² while retaining a mobility of 200,000 cm² V⁻¹ s⁻¹ when pursuing magnesium concentrations as low as x = 0.0038. By selecting an optimum magnesium content (x~0.01), the mobility is enhanced to over 700,000 cm² V⁻¹ s⁻¹ due to reduced impurity levels associated with the use of pure distilled ozone and avoiding interface roughness scattering. This control technique allows access to the coherent transport region with strong electron–electron interaction.
Additional Information
© 2011 The Japan Society of Applied Physics. Received July 14, 2011; accepted July 26, 2011; published online August 17, 2011. The authors thank Y. Matsubara for technical assistance. This work was partly supported by the Japan Society for the Promotion of Science (JSPS) through its "Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)" (A.T.) and Grant-in-Aid for Scientific Research No. 22840004 (Y.K.).Additional details
- Eprint ID
- 102323
- Resolver ID
- CaltechAUTHORS:20200403-115231482
- Japan Society for the Promotion of Science (JSPS)
- 22840004
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
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2020-04-06Created from EPrint's datestamp field
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2021-11-16Created from EPrint's last_modified field