Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-01-07
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Proceedings of EP2DS-16 (July 2005). Comments welcome. reilly@fas.harvard.edu
Scientific paper
10.1016/j.physe.2006.02.027
We describe a phenomenological model for the conductance feature near $0.7 \times 2e^2/h$ that occurs in quantum point contacts. We focus on the transconductance at finite source-drain bias and contrast our model with the results expected from a single-particle picture. Good agreement is seen in comparing the model with experimental data, taken on ultra-low-disorder GaAs induced electron systems. Although simple, our phenomenology suggests important boundary conditions for an underlying microscopic theory.
DiCarlo L.
Reilly David J.
Zhang Yajing
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