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Analysis of the temperature-dependent quantum point contact conductance in relation to the metal-insulator transition in two dimensions

Senz, V. ; Heinzel, Thomas ; Ihn, Thomas ; Lindemann, S. ; Held, R. ; Ensslin, Klaus ; Wegscheider, Werner ; Bichler, Max
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Date of publication of this fulltext: 30 Nov 2009 13:46


Abstract

The temperature dependence of the conductance of a quantum point contact has been measured. The conductance as a function of the Fermi energy shows temperature-independent fixed points, located at roughly multiple integers of e2/h. Around the first fixed point at e2/h, the experimental data for different temperatures can be scaled onto a single curve. For pure thermal smearing of the conductance ...

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