Enhancing hole mobility in III-V semiconductors

Details Enhancing hole mobility in III-V semiconductors Enhancing hole mobility in III-V semiconductors

2011-08-28

arxiv.org/abs/1108.5507v1

Physics

Condensed Matter

Materials Science

18 pages, 21 figures

Scientific paper

Transistors based on III-V semiconductor materials have been used for a variety of analog and high frequency applications driven by the high electron mobilities in III-V materials. On the other hand, the hole mobility in III-V materials has always lagged compared to group-IV semiconductors such as silicon and germanium. In this paper we explore the used of strain and heterostructure design guided by bandstructure modeling to enhance the hole mobility in III-V materials. Parameters such as strain, valence band offset, effective masses and splitting between the light and heavy hole bands that are important for optimizing hole transport are measured quantitatively using various experimental techniques. A peak Hall mobility for the holes of 960cm2/Vs is demonstrated and the high hole mobility is maintained even at high sheet charge.

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