Thermoelectric Detection of Multi-Subband Density of States in Semiconducting and Metallic Single-Walled Carbon Nanotubes

Sunao Shimizu; Takahiko Iizuka; Kaito Kanahashi; Jiang Pu; Kazuhiro Yanagi; Taishi Takenobu; Yoshihiro Iwasa

doi:10.1002/smll.201600807

Thermoelectric Detection of Multi-Subband Density of States in Semiconducting and Metallic Single-Walled Carbon Nanotubes

Small. 2016 Jul;12(25):3388-92. doi: 10.1002/smll.201600807. Epub 2016 May 18.

Authors

Sunao Shimizu¹, Takahiko Iizuka², Kaito Kanahashi³, Jiang Pu³, Kazuhiro Yanagi⁴, Taishi Takenobu³, Yoshihiro Iwasa^{1

2}

Affiliations

¹ RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.
² Quantum Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan.
³ Department of Applied Physics, Waseda University, Tokyo, 169-8555, Japan.
⁴ Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan.

PMID: 27191367
DOI: 10.1002/smll.201600807

Abstract

Thermoelectric detection of a multi-subband density of states in semiconducting and metallic single-walled carbon nanotubes is demonstrated by scanning the Fermi energy from electron-doped to hole-doped regions. The Fermi energy is systematically controlled by utilizing the strong electric field induced in electric-double-layer transistor configurations, resulting in the optimization of the thermoelectric power factor.

Keywords: Seebeck effect; carbon nanotubes; electric double layers; field effect transistors.