Modulation doping of InAs/AlSb quantum wells using remote InAs donor layers

被引:32
作者
Bennett, BR [1 ]
Yang, MJ [1 ]
Shanabrook, BV [1 ]
Boos, JB [1 ]
Park, D [1 ]
机构
[1] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA
关键词
D O I
10.1063/1.121010
中图分类号
O59 [应用物理学];
学科分类号
摘要
Sheet carrier concentrations in quantum wells of InAs clad by AlSb were enhanced by modulation doping with very thin (9-12 Angstrom) remote InAs(Si) donor layers. The growth temperature of the donor layers was a key parameter, with relatively low temperatures required to minimize Si segregation into the AlSb. Sheet carrier concentrations as high as 3.2X10(12)/cm(2) and 5.6X10(12)/cm(2) were achieved by single-and double-sided modulation doping, respectively. High electron mobility transistors fabricated using the modulation doped structure exhibited a unity current gain cut-off frequency of 60 GHz for a 0.5 mu m gate length at a source-drain voltage of 0.5 V. [S0003-6951(98)01010-9].
引用
收藏
页码:1193 / 1195
页数:3
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