 |
Journal articles
Electronic transport in planar atomic-scale structures measured by two-probe scanning tunneling spectroscopy
Abstract : Miniaturization of electronic circuits into the single-atom level requires novel approaches to characterize transport properties. Due to its unrivaled precision, scanning probe microscopy is regarded as the method of choice for local characterization of atoms and single molecules supported on surfaces. Here we investigate electronic transport along the anisotropic germanium (001) surface with the use of two-probe scanning tunneling spectroscopy and first-principles transport calculations. We introduce a method for the determination of the transconductance in our two-probe experimental setup and demonstrate how it captures energy-resolved information about electronic transport through the unoccupied surface states. The sequential opening of two transport channels within the quasi-one-dimensional Ge dimer rows in the surface gives rise to two distinct resonances in the transconductance spectroscopic signal, consistent with phase-coherence lengths of up to 50 nm and anisotropic electron propagation. Our work paves the way for the electronic transport characterization of quantum circuits engineered on surfaces.
Cited literature [66 references]
https://hal.archives-ouvertes.fr/hal-02160083
Contributor : Erik Dujardin <>
Submitted on : Monday, June 24, 2019 - 3:16:40 PM
Last modification on : Friday, January 10, 2020 - 9:10:04 PM
Contributor : Erik Dujardin <>
Submitted on : Monday, June 24, 2019 - 3:16:40 PM
Last modification on : Friday, January 10, 2020 - 9:10:04 PM
File
s41467-019-09315-6(1).pdf
Publisher files allowed on an open archive
Licence
Distributed under a Creative Commons Attribution 4.0 International License