کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1543610 | 1512867 | 2016 | 8 صفحه PDF | دانلود رایگان |
• We explore the low-frequency noise of interacting electrons in one dimension.
• The system is driven out of equilibrium by a QPC with an applied voltage.
• A second QPC serves to explore the statistics of outgoing electrons.
• Low-frequency noise in such a setup allows to measure the Luttinger liquid constant.
We explore the low-frequency noise of interacting electrons in a one-dimensional structure (quantum wire or interaction-coupled edge states) with counterpropagating modes, assuming a single channel in each direction. The system is driven out of equilibrium by a quantum point contact (QPC) with an applied voltage, which induces a double-step energy distribution of incoming electrons on one side of the device. A second QPC serves to explore the statistics of outgoing electrons. We show that measurement of a low-frequency noise in such a setup allows one to extract the Luttinger liquid constant K which is the key parameter characterizing an interacting 1D system. We evaluate the dependence of the zero-frequency noise on K and on parameters of both QPCs (transparencies and voltages).
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 82, August 2016, Pages 293–300