1. Crocus Nano Electronics, Volgogradskiy prospect 42 build. 5, premise 1, Moscow 109316, Russia
2. Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny 141700, Russia
3. Department of Electrical and Computer Engineering, University of California, 9500 Gilman Dr., La Jolla, San Diego, California 92093, USA