Interband tunneling in nanowires with diamond cubic or zincblende crystalline structure based on atomistic modeling

Details Interband tunneling in nanowires with diamond cubic or zincblende crystalline structure based on atomistic modeling Interband tunneling in nanowires with diamond cubic or zincblende crystalline structure based on atomistic modeling

2012-01-19

arxiv.org/abs/1201.4100v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, submitted to APL

Scientific paper

We present an investigation of band-to-band tunneling in nanowires with a diamond cubic or zincblende crystalline structure, as a function of cross section and longitudinal electric field. Results are obtained from quantum transport simulations based on non-equilibrium Green's functions with a tight-binding atomistic Hamiltonian. Interband tunneling is extremely sensitive to the longitudinal electric field, to the nanowire cross section, through the gap, and to the material. We have derived an approximate analytical expression for the transmission probability based on WKB theory and on a proper choice of the effective interband tunneling mass, which shows good agreement with results from atomistic quantum simulation.

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