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Effects of electron-electron scattering in wide ballistic microcontacts
1Institute of Radioengineering and Electronics, Mokhovaya 11-7, Moscow, 125009 Russia.
Physical Review Letters
|December 31, 2008
Summary
Electron-electron scattering introduces positive corrections to Sharvin conductance in ballistic microcontacts. These corrections exhibit distinct temperature dependencies for 3D and 2D systems, impacting experimental interpretations.
Area of Science:
- Condensed Matter Physics
- Mesoscopic Physics
- Quantum Transport
Background:
- Ballistic microcontacts exhibit Sharvin conductance, a fundamental property in mesoscopic systems.
- Electron-electron scattering can influence transport properties in nanoscale electronic devices.
Purpose of the Study:
- To calculate temperature-dependent corrections to Sharvin conductance due to electron-electron scattering.
- To analyze the impact of scattering on microcontacts in both 3D and 2D systems.
Main Methods:
- Utilized a semiclassical Boltzmann equation approach.
- Analyzed electron-electron scattering effects in the leads of microcontacts.
Main Results:
- Derived positive corrections to Sharvin conductance.
- Identified distinct temperature scaling: T(2)ln(EF/T) for 3D and T for 2D contacts.
- Corrections are significant for low temperatures.
Conclusions:
- Electron-electron scattering plays a crucial role in modifying microcontact conductance.
- The findings provide theoretical support for interpreting experimental results in 2D electron gas systems.
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