Electric-field-driven insulating-to-conducting transition in a mesoscopic quantum dot lattice
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PhysRevB.90.195443.pdf
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Author(s)
Ray, Nirat
Hanson, Micah P.
Gossard, A. C.
Staley, Neal Edward
Kastner, Marc
Date Issued
November 2014
Journal
Physical Review B
Publisher
American Physical Society
Citation
Staley, Neal E., Nirat Ray, Marc A. Kastner, Micah P. Hanson, and Arthur C. Gossard. "Electric-field-driven insulating-to-conducting transition in a mesoscopic quantum dot lattice." Phys. Rev. B 90, 195443 (November 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We investigate electron transport through a finite two dimensional mesoscopic periodic potential, consisting of an array of lateral quantum dots with electron density controlled by a global top gate. We observe a transition from an insulating state at low-bias voltages to a conducting state at high-bias voltages. The insulating state shows simply activated temperature dependence, with strongly gate voltage dependent activation energy. At low temperatures the transition between the insulating and conducting states becomes very abrupt and shows strong hysteresis. The high-bias behavior suggests underdamped transport through a periodic washboard potential resulting from collective motion.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.90.195443
