Abstract:Recently, p-n junction characteristics in nanometer scale have been investigated in relation with photonics and electronics applications. In this paper, we report the experimental observation of negative differential conductance (NDC), the basic indication of tunneling, in nanoscale p-n junctions under forward bias condition. The NDC has been observed only at low temperatures, suggesting that tunneling is mediated by some states in the band gap, most likely by individual dopants with deeper energy levels compa… Show more
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