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Nanomechanical pump–probe measurements of insulating electronic states in a carbon nanotube

Nature Nanotechnologyvolume 14pages161167 (2019) | Download Citation

Abstract

Transport measurements have been an indispensable tool in studying conducting states of matter. However, there exists a large set of interesting states that are insulating, often due to electronic interactions or topology, and are difficult to probe via transport. Here, through an experiment on carbon nanotubes, we present a new approach capable of measuring insulating electronic states through their back action on nanomechanical motion. We use a mechanical pump–probe scheme, allowing the detection of shifts in both frequency and dissipation rate of mechanical vibrational modes, in an overall insulating system. As an example, we use this method to probe the non-conducting configurations of a double quantum dot, allowing us to observe the theoretically predicted signature of nanomechanical back action resulting from a coherently tunnelling electron. The technique opens a new way for measuring the internal electronic structure of a growing variety of insulating states in one- and two-dimensional systems.

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The data that support the plots within this paper and other findings of this study are available from the corresponding author upon request.

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Acknowledgements

We thank A. Bachtold, F. Pistolesi and F. von Oppen for stimulating discussions and D. Mahalu for the e-beam writing. We further acknowledge support from the Minerva Foundation grant (712290).

Author information

Affiliations

  1. Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel

    • Ilya Khivrich
    •  & Shahal Ilani
  2. Institute for Molecular Engineering, University of Chicago, Chicago, IL, USA

    • Aashish A. Clerk

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Contributions

I.K. performed the experiments and analysed the data. I.K. and S.I. designed the experiments. I.K. and A.A.C. wrote the theoretical model. I.K. performed the numerical simulations. I.K., A.A.C. and S.I. contributed to its theoretical interpretation. I.K. and S.I. wrote the paper.

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Shahal Ilani.

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  1. Supplementary information

    Supplementary text and supplementary figures 1–7

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DOI

https://doi.org/10.1038/s41565-018-0341-6