Classical origin of conductance oscillations in an integrable cavity
@article{Poltl2016ClassicalOO, title={Classical origin of conductance oscillations in an integrable cavity}, author={Christina Poltl and Aleksey Kozikov and Klaus Ensslin and Thomas Ihn and Rodolfo Jalabert and Christian Reichl and Werner Wegscheider and Dietmar Weinmann}, journal={Physical Review B}, year={2016}, volume={94}, pages={195304} }
Scanning gate microscopy measurements in a circular ballistic cavity with a tip placed near its center yield a nonmonotonic dependence of the conductance on the tip voltage. Detailed numerical quantum calculations reproduce these conductance oscillations, and a classical scheme leads to its physical understanding. The large-amplitude conductance oscillations are shown to be of classical origin, and they are well described by the effect of a particular class of short trajectories.
6 Citations
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References
SHOWING 1-10 OF 13 REFERENCES
Scholarpedia 11
- 30946
- 2016
Nature (London) 410
- 183
- 2001
Nano Lett
- 5, 1285
- 2005
First-order perturbation theory of SGM 10,11 can only predict the initial slope in the curve of the conductance versus tip strength
Such a choice affects the value of the dimensionless strength parameter ut
Semicond
- Sci. Technol. 26, 064008
- 2011
The symmetry of the system, with equal width openings exactly opposite to each other, makes reflection after an odd number of bounces impossible, such that P b R (b) vanishes for all odd b
In addition, the tip potential affects the initial velocities. 31 Though it is in principle possible to take these two corrections into account, we have checked that for not too strong tip strength
New J
- Phys. 16, 063065
- 2014
Science 289
- 2323
- 2000