Nonlinear electron transport in normally pinched-off quantum wire K. S. Novoselov, Yu. V. Dubrovskii, V. A. Sablikov, D. Yu. Ivanov, E. E. Vdovin, Yu. N. Khanin, V. A. Tulin, D. Esteve and S. Beaumont Europhys. Lett., 52 6 (2000) 660-666 Published online: 01 September 2002 DOI: 10.1209/epl/i2000-00489-5