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arXiv · 1303.1151

Local Spin Susceptibilities of Low-Dimensional Electron Systems

Peter Stano·Jelena Klinovaja·Amir Yacoby·Daniel Loss
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Abstract

We investigate, assess, and suggest possibilities for a measurement of the local spin susceptibility of a conducting low-dimensional electron system. The basic setup of the experiment we envisage is a source-probe one. Locally induced spin density (e.g. by a magnetized atomic force microscope tip) extends in the medium according to its spin susceptibility. The induced magnetization can be detected as a dipolar magnetic field, for instance, by an ultra-sensitive nitrogen-vacancy center based detector, from which the spatial structure of the spin susceptibility can be deduced. We find that one-dimensional systems, such as semiconducting nanowires or carbon nanotubes, are expected to yield a measurable signal. The signal in a two-dimensional electron gas is weaker, though materials with high enough $g$-factor (such as InGaAs) seem promising for successful measurements.

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Peter Stano, Jelena Klinovaja, Amir Yacoby, Daniel Loss. 2013-03-05. Local Spin Susceptibilities of Low-Dimensional Electron Systems. https://doi.org/10.1103/physrevb.88.045441

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