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Current flow past an etched barrier: field emission from a two-dimensional electron gas

D. H. Cobden, G. Pilling, R. Parthasarathy, P. L. McEuen, I. M. Castleton, E. H. Linfield, D. A. Ritchie, and G. A. C. Jones

Europhys. Lett. 41, 327 (1998)