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Updated: May 4, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
Crossover from 'mesoscopic' to 'universal' phase for electron transmission in quantum dots
M Avinun-Kalish1, M Heiblum, O Zarchin
1Braun Center for Submicron Research, Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Phase measurements in small quantum dots reveal mesoscopic features for electron occupancies below 10. Universal behavior emerges for larger occupancies, offering insights into electron transport in mesoscopic systems.
Area of Science:
- Condensed Matter Physics
- Quantum Transport
Background:
- Phase measurements in coherent electron systems offer insights beyond conductance.
- Previous studies on large quantum dots showed universal phase behavior, unexplained by mesoscopic effects.
Purpose of the Study:
- Investigate phase evolution in small quantum dots (1-20 electrons).
- Identify mesoscopic features and transitions in phase behavior.
Main Methods:
- Phase measurements on small quantum dots.
- Analysis of electron transmission phase evolution with varying dot occupancy.
Main Results:
- Observed distinct mesoscopic features in phase evolution for dots with <10 electrons.
- Identified a transition to universal phase behavior for dots with ~14+ electrons.
Conclusions:
- Small quantum dots exhibit mesoscopic phase behavior, unlike larger dots.
- The transition from mesoscopic to universal phase evolution provides crucial data for theoretical models.
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