Phenomenology of the 0.7 conductance feature |
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Authors: | D.J. Reilly Y. Zhang L. DiCarlo |
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Affiliation: | aDepartment of Physics, Harvard University, Cambridge 02138, USA |
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Abstract: | We describe a phenomenological model for the conductance feature near 0.7×2e2/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. |
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Keywords: | 0.7 QPC Phenomenological Quantum wire Conductance |
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