Figure 2.

Transport characteristics. (a) Transfer characteristics show steep subthreshold characteristics with drain-voltage dependent threshold voltage shift. (b) Output characteristics show a saturating behavior followed by a negative differential resistance. (c) With increasing drain bias, the transmission window shrinks due to a spectral misalignment (Addition file 1). (d) The increasing Fermi function difference between the two contacts and the decreasing transmission lead to an increasing and then decreasing T(E)[fsfd] function.

Raza Nanoscale Research Letters 2013 8:74   doi:10.1186/1556-276X-8-74
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