期刊
PHYSICAL REVIEW B
卷 78, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.113306
关键词
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资金
- European Commission (IST-SUBTLE)
The nonlinear conductance of quantum wires has been studied in magnetic fields by applying an in-plane electric field via side gates. It has been found that magnetic-field asymmetries, defined as the change in the conductance induced by a change in the magnetic-field sign, become more pronounced the larger the gate voltage is and increase linearly with the bias voltage up to several millivolts. With an in-plane electric field the asymmetry can be tuned, the symmetry recovered, and also the asymmetry reversed, which is associated with a field-effect controlled backscattering of electrons.
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