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arXiv · 1202.0801

Observation of degenerate one-dimensional sub-bands in cylindrical InAs nanowires

Alexandra C. Ford·S. Bala Kumar·Rehan Kapadia·Jing Guo·Ali Javey
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Abstract

One-dimensional (1D) sub-bands in cylindrical InAs nanowires (NWs) are electrically mapped as a function of NW diameter in the range of 15-35 nm. At low temperatures, stepwise current increases with the gate voltage are clearly observed and attributed to the electron transport through individual 1D sub-bands. The two-fold degeneracy in certain sub-band energies predicted by simulation due to structural symmetry is experimentally observed for the first time. The experimentally obtained sub-band energies match the simulated results, shedding light on both the energies of the sub-bands as well as the number of sub-bands populated per given gate voltage and diameter. This work serves to provide better insight into the electrical transport behavior of 1D semiconductors.

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Alexandra C. Ford, S. Bala Kumar, Rehan Kapadia, Jing Guo, Ali Javey. 2012-02-03. Observation of degenerate one-dimensional sub-bands in cylindrical InAs nanowires. https://doi.org/10.1021/nl203895x

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