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Band-like transport in high mobility unencapsulated single-layer MoS2 transistors

delete2013-05-01
delete417
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OA
AI
D
Deep Jariwala
V
Vinod K. Sangwan
D
Dattatray J. Late
J
James E. Johns
V
Vinayak P. Dravid
T
Tobin J. Marks
L
Lincoln J. Lauhon
M
Mark C. Hersam *
DOI:10.1063/1.4803920delete
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Abstract

Abstract

En 中文
Ultra-thin MoS2 has recently emerged as a promising two-dimensional semiconductor for electronic and optoelectronic applications. Here, we report high mobility (>60 cm(2)/Vs at room temperature) field-effect transistors that employ unencapsulated single-layer MoS2 on oxidized Si wafers with a low level of extrinsic contamination. While charge transport in the sub-threshold regime is consistent with a variable range hopping model, monotonically decreasing field-effect mobility with increasing temperature suggests band-like transport in the linear regime. At temperatures below 100 K, temperature-independent mobility is limited by Coulomb scattering, whereas, at temperatures above 100 K, phonon-limited mobility decreases as a power law with increasing temperature. (C) 2013 AIP Publishing LLC.
Keywords:
VALLEY POLARIZATION
SCATTERING MOBILITY
ELECTRON-MOBILITY
SILICON
PHOTOTRANSISTORS

Journal

Applied Physics Letters cover
Applied Physics Letters
IF:
3.6
Papers:
10.4W
Citations:
17.8W

Organization

N
Northwestern University
Scholars:
6.1W
Papers: 5.2W
Citations: 3.9K
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