Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.4K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred...
2.4K
Reversible and Irreversible Processes01:14

Reversible and Irreversible Processes

5.5K
The thermodynamic processes can be classified into reversible and irreversible processes. The processes that can be restored to their initial state are called reversible processes. It is only possible if the process is in quasi-static equilibrium, i.e., it takes place in infinitesimally small steps, and the system remains at equilibrium However, these are ideal processes and do not occur naturally. An ideal system undergoing a reversible process is always in thermodynamic equilibrium within...
5.5K
Radical Anti-Markovnikov Addition to Alkenes: Thermodynamics01:32

Radical Anti-Markovnikov Addition to Alkenes: Thermodynamics

2.5K
The anti-Markovnikov addition of hydrogen halides to an alkene is thermodynamically feasible only with HBr. The radical addition reaction with other hydrogen halides like HCl and HI is thermodynamically unfavorable.
2.5K
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

3.8K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
3.8K
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

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

3.3K
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.
3.3K
Fermi Level01:18

Fermi Level

1.6K
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
1.6K

You might also read

Related Articles

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

Sort by
Same author

Genomic characterization and pathogenicity validation of Mycoplasma ovipneumoniae strains from diseased sheep: insights into potential pathogenic mechanisms of GSWW364.

Veterinary research·2026
Same author

Development and preliminary evaluation of multiplex PCR assays for the detection of bacterial respiratory pathogens in bovine and ovine.

Veterinary and animal science·2026
Same author

Epigenetic analysis of sheep mycoplasma pneumonia and the effect of <i>FOXF1</i> on <i>Mycoplasma ovipneumoniae</i> infection.

Virulence·2026
Same author

Planar Josephson junctions templated by nanowire shadowing.

Nanotechnology·2026
Same author

Nanoscale control over single vortex motion in an unconventional superconductor.

Nanoscale·2026
Same author

Programmable Phase Selection between Altermagnetic and Noncentrosymmetric Polymorphs of MnTe on InP via Molecular Beam Epitaxy.

ACS applied materials & interfaces·2026

Related Experiment Video

Updated: Jan 10, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.4K

Reversible Modification of Rashba States in Topological Insulators at Room Temperature by Edge Functionalization.

Wonhee Ko1, Seoung-Hun Kang2,3,4,5, Qiangsheng Lu2

  • 1Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee, 37996, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 20, 2025
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate a new method to control spin texture in quantum materials. By functionalizing bismuth selenide (Bi2Se3) films, they can reversibly switch spin-orbit coupling (SOC) and Rashba edge states at room temperature.

Keywords:
Rashba edge statesdensity functional theoryfunctionalizationscanning tunneling microscopytopological insulators

More Related Videos

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K
Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

15.5K

Related Experiment Videos

Last Updated: Jan 10, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.4K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K
Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

15.5K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Computing

Background:

  • Strong spin-orbit coupling (SOC) is crucial for novel spin textures in quantum materials.
  • Topological insulators possess inherent strong SOC, influencing topological and Rashba states.
  • Controlling spin texture in these materials reversibly remains a challenge.

Purpose of the Study:

  • To develop a methodology for reversible control of spin texture in topological insulators.
  • To investigate the impact of surface functionalization on spin-orbit coupling strength.
  • To explore the modification of Rashba edge states in bismuth selenide (Bi2Se3) films.

Main Methods:

  • Functionalization of Bi2Se3 films by altering step-edge termination.
  • Utilizing scanning tunneling microscopy/spectroscopy (STM/STS) to observe edge states.
  • Performing density functional theory (DFT) calculations to analyze electronic structure changes.

Main Results:

  • Altering step-edge termination in Bi2Se3 films modifies SOC strength and Rashba edge state strength.
  • Rashba edge states were observed to arise and vanish through selenium (Se) functionalization and reduction.
  • Fully reversible and repeatable switching of Rashba edge states was achieved at room temperature.

Conclusions:

  • Selenium functionalization offers a practical route to tune SOC and spin texture in topological insulators.
  • The findings pave the way for advanced spintronic devices utilizing controlled spin textures.
  • This method provides a new paradigm for manipulating quantum states in materials.