Related Experiment Video
Updated: Jul 8, 2026
06:34
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
Published on: September 2, 2016
Spin cloud induced around an elastic scatterer by the intrinsic spin hall effect
1Institute of Spectroscopy, Russian Academy of Science, 142190, Troitsk, Moscow oblast, Russia.
Physical Review Letters
|October 10, 2006
Summary
A spin-polarized electron cloud can form around impurities due to the spin Hall effect. This occurs with Rashba spin-orbit interaction, even without a bulk spin Hall current.
Area of Science:
- Condensed Matter Physics
- Spintronics
- Quantum Mechanics
Background:
- The Landauer electric dipole is formed around impurities by electric current.
- The intrinsic spin Hall effect generates spin currents.
- Spin-orbit interaction influences electron behavior.
Purpose of the Study:
- To investigate the formation of spin-polarized electron clouds near impurities.
- To explore the role of the spin Hall effect and spin-orbit interaction in this phenomenon.
- To determine if such clouds can form in the absence of bulk spin Hall current.
Main Methods:
- Theoretical analysis of electron behavior near a spin-independent elastic scatterer.
- Modeling the effects of Rashba spin-orbit interaction.
- Investigating electron dynamics in the ballistic regime.
Main Results:
- A spin-polarized electron cloud is induced near the impurity via the intrinsic spin Hall effect.
- This effect is observed in the ballistic range around the impurity.
- The spin-polarized cloud formation occurs even when the bulk spin Hall current is absent, specifically with Rashba spin-orbit interaction.
Conclusions:
- Rashba spin-orbit interaction enables the formation of spin-polarized electron clouds near impurities.
- The intrinsic spin Hall effect plays a crucial role in this localized phenomenon.
- This finding extends the understanding of spin phenomena in condensed matter systems.
Related Concept Videos
01:03Atomic Nuclei: Nuclear Spin State Overview
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
01:23Atomic Nuclei: Nuclear Relaxation Processes
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis. This...
01:08Spin–Spin Coupling Constant: Overview
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
01:22Motion Of A Charged Particle In A Magnetic Field
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
01:30The Hall Effect
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.
01:23Magnetic Field due to Moving Charges
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...