Ni薄膜/ポリエチレンナフタレート（PEN）有機膜を用いた量子十字素子の作製とその評価

We fabricated quantum cross (QC) devices consisting of two Ni thin-film ribbons, deposited on polyethylenenaphthalate (PEN) substrates, in an edge-to-edge configuration. The cross-sectional area between the Ni electrodes, which was made without the use of electron-beam or optical lithography, is as small as 17 nm x 17 nm. We successfully obtained ohmic current-voltage characteristics, which show good qualitative agreement with calculationresults within the framework of the modified Anderson model under a strong coupling limit. According to thecalculation results, a high switching on/off ratio beyond 10000:1 can be realized when a molecule is sandwiched between two electrodes in QC devices.