Unusually Large Enhancement of Thermopower in an Electric Field Induced Two-Dimensional Electron Gas

被引：76

作者：

Ohta, Hiromichi ^{[1
,2
]}

Mizuno, Taku ^{[1
]}

Zheng, Shijian ^{[3
]}

Kato, Takeharu ^{[3
]}

Ikuhara, Yuichi ^{[3
,4
]}

Abe, Katsumi ^{[5
,6
]}

Kumomi, Hideya ^{[5
]}

Nomura, Kenji ^{[6
]}

Hosono, Hideo ^{[6
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Chiyoda Ku, Tokyo 1020075, Japan

[3] Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan

[4] Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan

[5] Canon Inc, Ohta Ku, Tokyo 1468501, Japan

[6] Tokyo Inst Technol, Frontier Res Ctr, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 06期

关键词：

two-dimensional electron gas; SrTiO3; thermopower; electric field modulation; SEEBECK COEFFICIENT; THERMOELECTRIC PROPERTIES; SRTIO3;

D O I：

10.1002/adma.201103809

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Unusually large thermopower modulation is demonstrated using a field effect transistor structure on a thermoelectric material. An electric field application provides an extremely thin (similar to 2 nm) two-dimensional electron gas (2DEG), which exhibits unusually large thermopower, approximately five times larger than that of the bulk. The present electric field induced 2DEG approach may accelerate the development of nanostructures for high performance thermoelectric materials.

引用

页码：740 / +

页数：6

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