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Band-like transport in high mobility unencapsulated single-layer MoS2 transistors
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DOI:10.1063/1.4803920.png)
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
IF:
3.6
Papers:
10.4W
Citations:
17.8W
