Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...

Atomic Nuclei: Nuclear Relaxation Processes

Atomic 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.

Spin–Spin Coupling Constant: Overview

Spin–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...

[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Exploring techno-economic landscapes of abatement options for hard-to-electrify sectors.

Nature communications·2025

Same author

Archetypal landscapes for deep neural networks.

Proceedings of the National Academy of Sciences of the United States of America·2020

See all related articles

Search research articles

Related Experiment Video

Updated: Dec 25, 2025

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

Chirality relaxation in low-temperature strongly Rashba-coupled systems.

P C Verpoort¹, V Narayan¹

¹Department of Physics, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|April 3, 2020

Summary

Inter-carrier scattering, not phonon interactions, drives relaxation of charge carrier chirality in Rashba systems at low temperatures. This finding is crucial for understanding spin dynamics in materials like GeTe.

Keywords:

Boltzmann relaxation Rashba non-equilibrium

More Related Videos

Practical Aspects of Sample Preparation and Setup of 1H R1ρ Relaxation Dispersion Experiments of RNA

Practical Aspects of Sample Preparation and Setup of ¹H R_1ρ Relaxation Dispersion Experiments of RNA

Published on: July 9, 2021

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

Related Experiment Videos

Last Updated: Dec 25, 2025

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

Practical Aspects of Sample Preparation and Setup of 1H R1ρ Relaxation Dispersion Experiments of RNA

Practical Aspects of Sample Preparation and Setup of ¹H R_1ρ Relaxation Dispersion Experiments of RNA

Published on: July 9, 2021

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

Area of Science:

Condensed Matter Physics
Materials Science
Quantum Mechanics

Background:

Non-equilibrium chirality distributions in charge carriers are key to spintronic applications.
Rashba systems exhibit unique spin-momentum locking, influencing carrier dynamics.
Understanding relaxation mechanisms is vital for controlling spin states in materials.

Purpose of the Study:

To investigate the relaxation dynamics of non-equilibrium chirality in charge carriers within Rashba systems.
To identify the dominant scattering mechanisms responsible for chirality relaxation at low temperatures.
To develop a theoretical framework for inter-carrier scattering in these systems and assess its relevance to specific materials like GeTe.

Main Methods:

Theoretical modeling of charge carrier dynamics in Rashba systems.
Analysis of inter-band transitions and scattering processes (phonon and inter-carrier).
Calculation of relaxation timescales based on Coulomb interactions and spin textures.

Main Results:

Inter-Rashba band transitions are suppressed at low temperatures due to Rashba momentum split and chiral spin texture.
Phonon-mediated momentum exchange is negligible when thermal phonon momentum is less than twice the Rashba momentum.
Inter-carrier scattering emerges as the primary relaxation mechanism for non-equilibrium chirality.
The opposing spin structure of Rashba bands significantly impacts inter-carrier scattering magnitude.
An explicit formula for the inter-band relaxation timescale due to inter-carrier Coulomb scattering was derived.

Conclusions:

Inter-carrier Coulomb scattering is the dominant mechanism for relaxing non-equilibrium chirality in Rashba systems at low temperatures.
The findings provide a general framework applicable to bulk Rashba semiconductors such as GeTe.
This work clarifies the fundamental processes governing spin dynamics in materials with strong spin-orbit coupling.