Figure 4.

Figure-of-merit versus the intradot level εd for td = 0.1, 0.2, 0.3, 0.4. Other parameters are tLR = td /2, U = 5, and ϕ = 0.

Zheng et al. Nanoscale Research Letters 2012 7:157   doi:10.1186/1556-276X-7-157
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