School of Physics, The University of New South Wales, Sydney, NSW 2052, Australia and Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
School of Physics, The University of New South Wales, Sydney, NSW 2052, Australia.
Phys Rev Lett. 2016 Mar 25;116(12):126801. doi: 10.1103/PhysRevLett.116.126801. Epub 2016 Mar 21.
The electron g factor measured in a quantum point contact by source-drain bias spectroscopy is significantly larger than its value in a two-dimensional electron gas. This enhancement, established experimentally in numerous studies, is an outstanding puzzle. In the present work we explain the mechanism of this enhancement in a theory accounting for the electron-electron interactions. We show that the effect relies crucially on the nonequilibrium nature of the spectroscopy at finite bias.
通过源漏偏压光谱法测量的量子点接触中的电子 g 因子明显大于其在二维电子气中的值。这种增强在众多实验中得到了证实，是一个突出的难题。在目前的工作中，我们在考虑电子-电子相互作用的理论中解释了这种增强的机制。我们表明，该效应依赖于有限偏压下光谱法的非平衡性质。
