Magnetic-field asymmetry of nonlinear transport in narrow channels with asymmetric hybrid confinement
作者： Bettina Brandenstein-Köth , Lukas Worschech , Alfred Forchel
DOI: 10.1063/1.3204462
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摘要: The authors realized narrow constrictions in a two-dimensional electron gas (2DEG) with an in-plane asymmetry by means of hybrid confinement. Unequal sidewalls the were formed combination single etched trench modulation doped GaAs/AlGaAs heterostructure which cuts through 2DEG adjacent metallic top-gate, depletes underlying 2DEG. two-terminal conductance was analyzed magnetic fields applied perpendicular to sample surface. In nonlinear transport, shows pronounced differences for inversion field. asymmetric is related scattering asymmetries caused different constriction.
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