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Nonlinear magnetoconductance of a classical ballistic system
1Department of Physics, University of Washington, Seattle, Washington 98195, USA.
Physical Review Letters
|February 7, 2007
Summary
We investigated nonlinear electrical transport in a classical system, finding a novel current component dependent on voltage and magnetic field. This classical effect is significant even at low temperatures and dominates at higher temperatures.
Area of Science:
- Condensed Matter Physics
- Mesoscopic Physics
- Quantum Transport
Background:
- Understanding electron transport in nanoscale systems is crucial.
- Coulomb interactions significantly influence electron behavior.
- Nonlinear transport phenomena are key to device applications.
Purpose of the Study:
- To investigate nonlinear transport in a classical ballistic system.
- To analyze the role of Coulomb interactions on electron trajectories.
- To identify symmetry-breaking effects in nonlinear current.
Main Methods:
- Theoretical study of a classical ballistic system.
- Inclusion of Coulomb interaction between electrons.
- Analysis of current I(V,H) under applied bias V and magnetic field H.
Main Results:
- A nonlinear current component deltaI=alpha(cl)V(2)H lacking H-->-H symmetry was identified.
- The classical mechanism's magnitude is comparable to quantum interference at zero temperature.
- This classical mechanism shows weak temperature dependence.
Conclusions:
- Classical Coulomb interactions can induce significant nonlinear transport effects.
- The identified classical mechanism is robust across temperatures.
- This finding offers insights into electron transport beyond quantum effects.
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