Electric-field driven insulating to conducting transition in a mesoscopic quantum dot lattice
arXiv:1411.3179 · doi:10.1103/PhysRevB.90.195443
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.
arXiv comment4 pages, 4 figures
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- A Direct Determination of the Temperature of Overheated Electrons in an Insulator
- Hysteresis and jumps in the I-V curves of disordered two-dimensional materials