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arXiv · 1810.11174

The geometric potential of a double-frequency corrugated surface

Wei-Ran Cao·Yong-Long Wang·Xiao-Lei Chen·Hua Jiang·Chang-Tan Xu·Hong-Shi Zong
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Abstract

For an electron confined to a surface reconstructed by double-frequency corrugations, we give the effective Hamiltonian by the formula of geometric influences, obtain an additive scalar potential induced by curvature that consists of attractive wells with different depth. The difference is generated by the multiple frequency of the double-frequency corrugation. Subsequently, we investigate the effects of geometric potential on the transmission probability, and find the resonant tunneling peaks becoming rapidly sharper and the transmission gaps being substantially widened with increasing the multiple frequency. As a potential application, double-frequency corrugations can be employed to select electrons with particular incident energy, as an electronic switch, which are more effective than a single-frequency ones.

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Wei-Ran Cao, Yong-Long Wang, Xiao-Lei Chen, Hua Jiang, Chang-Tan Xu, Hong-Shi Zong. 2019-10-01. The geometric potential of a double-frequency corrugated surface. https://doi.org/10.1016/j.physleta.2019.04.013

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