Related Experiment Video
Updated: Sep 3, 2025
08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
7.2K
Magnetoconductance Anisotropies and Aharonov-Casher Phases
R I Shekhter1, O Entin-Wohlman2, M Jonson1
1Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden.
Physical Review Letters
|July 29, 2022
Summary
This study introduces a method to measure the Aharonov-Casher phase in spin-orbit interaction (SOI) devices. The technique utilizes magnetoconductance anisotropy to calibrate spintronic devices by tuning the SOI strength with an electric field.
Area of Science:
- Condensed Matter Physics
- Spintronics
- Quantum Mechanics
Background:
- Spin-orbit interaction (SOI) is crucial for controlling electron transport properties.
- The Aharonov-Casher phase, determined by SOI, influences device functionality.
- Direct measurement of this phase is essential for device calibration.
Purpose of the Study:
- To propose a direct method for measuring the Aharonov-Casher phase in SOI-active weak links.
- To demonstrate the application of this method using Rashba interaction induced by an electric field.
- To enable precise calibration of spintronic devices.
Main Methods:
- Utilizing the anisotropy of magnetoconductance in SOI-active weak links.
- Relating magnetoconductance anisotropy to the Aharonov-Casher phase.
- Employing an external electric field to tune Rashba interaction and SOI strength.
Main Results:
- A direct correlation between magnetoconductance anisotropy and the Aharonov-Casher phase was established.
- The proposed method allows for the measurement of the Aharonov-Casher phase.
- The study confirms the tunability of the Aharonov-Casher phase via external electric fields.
Conclusions:
- The developed method provides a direct route to measure the Aharonov-Casher phase.
- This technique facilitates the calibration of spintronic devices by controlling SOI.
- The findings are applicable to various forms of spin-orbit coupling, including Rashba interaction.
Related Concept Videos
01:27π Electron Effects on Chemical Shift: Overview
1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
01:23Magnetic Field due to Moving Charges
9.2K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
9.2K
01:30The Hall Effect
2.7K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
2.7K
01:28Magnetostatic Boundary Conditions
1.1K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.1K
01:26Diamagnetism
2.5K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.5K
01:25Magnetic Force On A Current-Carrying Conductor
4.2K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.2K