Giant magneto-piezoresistance and internal friction in a two-dimensional electron system

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作者：
Yamaguchi, Hiroshi [1 ]
Okamoto, Hajime [1 ]
Maruta, Yuki [1 ,2 ]
Ishihara, Sunao [2 ]
Miyashita, Sen [3 ]
Hirayama, Yoshiro [1 ,4 ,5 ]
机构：
[1] NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan
[2] Department of Engineering Synthesis, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
[3] NTT Advanced Technology, Atsugi, Kanagawa 243-0198, Japan
[4] Department of Physics, Tohoku University, Sendai 980-8578, Japan
[5] SORST-JST, Kawaguchi, Saitama 331-0012, Japan
来源：
Japanese Journal of Applied Physics, Part 2: Letters | 2007年 / 46卷 / 25-28期
关键词：
We use a micromechanical cantilever with an integrated two-dimensional electron system to show that an extremely small strain of the order of 10 -4 induces a localized-delocalized electronic state transition. This strong strain effect improves the piezoresistive gauge factor by more than two orders of magnitude compared to the conventional Si cantilever. Furthermore; we found that the cantilever mechanical motion is affected considerably by friction exerted by the electron systems. © 2007 The Japan Society of Applied Physics;
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