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 language | English |
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Article number | 1707390 |
Number of pages | 6 |
Journal | Advanced Materials |
Volume | 30 |
Issue number | 41 |
DOIs | |
State | Published - 11 Oct 2018 |
Keywords
- 2D electron gas
- chiral molecules
- electron transfer
- semiconductors
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- General Materials Science