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arXiv · 1709.09058

A capacitance spectroscopy-based platform for realizing gate-defined electronic lattices

T. Hensgens·U. Mukhopadhyay·P. Barthelemy·S. Fallahi·G. C. Gardner·C. Reichl·W. Wegscheider·M. J. Manfra·L. M. K. Vandersypen
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Abstract

Electrostatic confinement in semiconductors provides a flexible platform for the emulation of interacting electrons in a two-dimensional lattice, including in the presence of gauge fields. This combination offers the potential to realize a wide host of quantum phases. Here we present a measurement and fabrication scheme that builds on capacitance spectroscopy and allows for the independent control of density and periodic potential strength imposed on a two-dimensional electron gas. We characterize disorder levels and (in)homogeneity and develop and optimize different gating strategies at length scales where interactions are expected to be strong. A continuation of these ideas might see to fruition the emulation of interaction-driven Mott transitions or Hofstadter butterfly physics.

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T. Hensgens, U. Mukhopadhyay, P. Barthelemy, S. Fallahi, G. C. Gardner, C. Reichl, W. Wegscheider, M. J. Manfra, L. M. K. Vandersypen. 2017-09-26. A capacitance spectroscopy-based platform for realizing gate-defined electronic lattices. https://doi.org/10.1063/1.5046796

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