Statistical study of conductance properties in one-dimensional quantum wires focusing on the 0.7 anomaly
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Abstract
The properties of conductance in one-dimensional (1D) quantum wires are
statistically investigated using an array of 256 lithographically-identical
split gates, fabricated on a GaAs/AlGaAs heterostructure. All the split gates
are measured during a single cooldown under the same conditions. Electron
many-body effects give rise to an anomalous feature in the conductance of a
one-dimensional quantum wire, known as the 0.7 structure' (or
0.7 anomaly').
To handle the large data set, a method of automatically estimating the
conductance value of the 0.7 structure is developed. Large differences are
observed in the strength and value of the 0.7 structure [from
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1550-235X
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Engineering and Physical Sciences Research Council (EP/K004077/1)