We report an experimental observation and direct control of quantum transport in artificial two-dimensional Au lattices. Combining the advanced techniques of low-temperature deposition and newly developed double-probe scanning tunneling spectroscopy, we display a two-dimensional carrier transport and demonstrate a strong in-plane transport modulation in the two-dimensional Au lattices. In well-ordered Au lattices, we observe the carrier transport behavior manifesting as a band-like feature with an energy gap. Furthermore, controlled structural modification performed by constructing coupled “stadiums” enables a transition of system dynamics in the lattices, which in turn establishes tunable resonant transport throughout a wide energy range. Our findings open the possibility of the construction and transport engineering of artificial lattices by the geometrical arrangement of scatterers and quantum chaotic dynamics.
Li, K., Zhang, C., Wu, Y., Lin, W., Zheng, X., Zhou, Y., ... Kang, J. (2018). In-plane anisotropy of quantum transport in artificial two-dimensional Au lattices. Nano Letters, 18(3), 1724–1732. https://doi.org/10.1021/acs.nanolett.7b04783