Gleb Finkelstein
Professor of Physics

Gleb Finkelstein is an experimental physicist interested in inorganic and biologically inspired nanostructures: carbon nanotubes, graphene, and self-assembled DNA 'origami'. These objects reveal a variety of interesting electronic properties that may form a basis for future detectors and sensors, or serve as individual devices in quantum information processing.

Current Research Interests

Four years ago, my laboratory observed superconducting current induced in the regime of the quantum Hall effect [F. Amet et al., Science 352, p. 966], which was the first observation of this kind in any material system. Since then, much of the work in my laboratory has been focussed on a variety of Superconductor-Quantum Hall hybrid devices. Last year, we realized a quantum Hall-based SQUID [A. Seredinski et al., Science Advances 5, eaaw8693]. This year, we reported on the observation of the chiral Andreev edge states - neutral fermionic excitations formed at the interface of a superconductor and a quantum Hall system - predicted 20 years ago [L. Zhao et al., Nature Physics 16, 862].

In parallel with this main direction, we have been exploring other aspects of graphene-based Josephson junctions. Last year, we reported on the first realization of multi-terminal Josephson junctions in a ballistic material [A. Draelos et all., Nano Letters 19, 1039]. This year, we published and extensive study of quantized "Shapiro steps" in the same material system [T. Larson et al., Nano Letters 16, 862]. (Impact factor of Nano Letters is more than 10, higher than e.g. PRL.) The progress achieved in these two papers was combined in our draft preprint on Shapiro steps in multiterminal Josephson junctions.

Our ability to make new samples was limited due to COVID and the restricted access to the Duke Shared Materials Instrumentation Facility. We used this time to set up cryogenic cables, filters and amplifiers in our new cryostat. This new instrument, which was installed in 2019, is reaching 3 times lower temperatures (10 mK) and higher magnetic fields (12 Tesla) than our previous main instrument, and I expect this will have a significant impact on future productivity of the group.

Edited  Dec. 2020

Current Appointments & Affiliations

Contact Information

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