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Local spin susceptibilities of low-dimensional electron systems

Peter Stano, Jelena Klinovaja, Amir Yacoby, and Daniel Loss
Phys. Rev. B 88, 045441 – Published 29 July 2013

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 ultrasensitive 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 a high enough g-factor (such as InGaAs) seem promising for successful measurements.

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  • Received 6 March 2013

DOI:https://doi.org/10.1103/PhysRevB.88.045441

©2013 American Physical Society

Authors & Affiliations

Peter Stano1,2, Jelena Klinovaja1, Amir Yacoby3, and Daniel Loss1

  • 1Department of Physics, Klingelbergstrasse 82, University of Basel, Switzerland
  • 2Institute of Physics, Slovak Academy of Sciences, 845 11 Bratislava, Slovakia
  • 3Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

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Issue

Vol. 88, Iss. 4 — 15 July 2013

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