Nagaev K E, Ayvazyan O S
Institute of Radioengineering and Electronics, Mokhovaya 11-7, Moscow, 125009 Russia.
Phys Rev Lett. 2008 Nov 21;101(21):216807. doi: 10.1103/PhysRevLett.101.216807.
We calculate the corrections to the Sharvin conductance of ballistic multimode microcontacts that result from electron-electron scattering in the leads. Using a semiclassical Boltzmann equation, we obtain that these corrections are positive and scale with temperature as T(2)ln(EF/T) for three-dimensional contacts and as T for two-dimensional ones. These results are relevant to recent experiments on two-dimensional electron gas contacts.
