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VOLUME 52 (1990) | ISSUE 2 | PAGE 763
Semiclassical ballistic microcontact in strong magnetic field
The resistance of a semiclassical ballistic point contact Phased on a two-dimensional electron gas of an AlCaAs-CaAs heterojunction increases by three to four orders of magnitude when the Fermi level reaches the Landau level with / = 2. The R (B) curve exhibits several plateaus near which R = h /ie2 (z>4) if the Fermi level is situated near the diffuse Landau level.