@article {TikhonovE.S.[12014,
	title = {Nonlinear transport and noise thermometry in quasiclassical ballistic point contacts},
	journal = {Physical review. B, Condensed matter and materials physics},
	volume = {90},
	year = {2014},
	publisher = {Published by the American Physical Society through the American Institute of Physics,},
	address = {Woodbury, NY},
	abstract = {We study nonlinear transport and nonequilibrium current noise in quasiclassical point contacts (PCs) defined in a low-density, high-quality two-dimensional electron system in GaAs. At not too high bias voltages V across the PC, the noise temperature is determined by a Joule heat power and is almost independent on the PC resistance that can be associated with a self-heating of the electronic system. This commonly accepted scenario breaks down at increasing V, where we observe extra noise accompanied by a strong decrease of the PCś differential resistance. The spectral density of the extra noise is roughly proportional to the nonlinear current contribution in the PC, ?S?2F*|e?I| V2, with the effective Fano factor F*<1, indicating that a random scattering process is involved. A small perpendicular magnetic field is found to suppress both ?I and ?S. Our observations are consistent with a concept of a draglike mechanism of the nonlinear transport mediated by electron-electron scattering in the leads of quasiclassical PCs.},
	issn = {1098-0121},
	doi = {10.1103/PhysRevB.90.161405},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84908179329&partnerID=q2rCbXpz},
	author = {Tikhonov, E.S. and Melnikov, M.Yu. and Shovkun, D.V. and Sorba, L. and Biasiol, G. and Khrapai, V.S.}
}
