Measurement of carrier mobility in silicon nanowires

被引:115
作者
Gunawan, Oki [1 ]
Sekaric, Lidija [1 ]
Majumdar, Amlan [1 ]
Rooks, Michael [1 ]
Appenzeller, Joerg [1 ]
Sleight, Jeffrey W. [1 ]
Guha, Supratik [1 ]
Haensch, Wilfried [1 ]
机构
[1] IBM Corp, Div Res, TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA
关键词
D O I
10.1021/nl072646w
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report the first direct capacitance measurements of silicon nanowires (SiNWs) and the consequent determination of field carrier mobilities in undoped-channel SiNW field-effect transistors (FETs) at room temperature. We employ a two-FET method for accurate extraction of the intrinsic channel resistance and intrinsic channel capacitance of the SiNWs. The devices used in this study were fabricated using a top-down method to create SiNW FETs with up to 1000 wires in parallel for increasing the raw capacitance while maintaining excellent control on device dimensions and series resistance. We found that, compared with the universal mobility curves for bulk silicon, the electron and hole mobilities in nanowires are comparable to those of the surface orientation that offers a lower mobility.
引用
收藏
页码:1566 / 1571
页数:6
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