Spin-Dependent Processes Measured without a Permanent Magnet

Claudio Fontanesi, Eyal Capua, Yossi Paltiel, David H. Waldeck, Ron Naaman*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

27 Scopus citations

Abstract

A novel Hall circuit design that can be incorporated into a working electrode, which is used to probe spin-selective charge transfer and charge displacement processes, is reviewed herein. The general design of a Hall circuit based on a semiconductor heterostructure, which forms a shallow 2D electron gas and is used as an electrode, is described. Three different types of spin-selective processes have been studied with this device in the past: i) photoinduced charge exchange between quantum dots and the working electrode through chiral molecules is associated with spin polarization that creates a local magnetization and generates a Hall voltage; ii) charge polarization of chiral molecules by an applied voltage is accompanied by a spin polarization that generates a Hall voltage; and iii) cyclic voltammetry (current–voltage) measurements of electrochemical redox reactions that can be spin-analyzed by the Hall circuit to provide a third dimension (spin) in addition to the well-known current and voltage dimensions. The three studies reviewed open new doors into understanding both the spin current and the charge current in electronic materials and electrochemical processes.

Original languageAmerican English
Article number1707390
JournalAdvanced Materials
Volume30
Issue number41
DOIs
StatePublished - 11 Oct 2018

Bibliographical note

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • 2D electron gas
  • chiral molecules
  • electron transfer
  • semiconductors

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