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

Gauss's Law01:07

Gauss's Law

If a closed surface does not have any charge inside where an electric field line can terminate, then the electric field line entering the surface at one point must necessarily exit at some other point of the surface. Therefore, if a closed surface does not have any charges inside the enclosed volume, then the electric flux through the surface is zero. What happens to the electric flux if there are some charges inside the enclosed volume? Gauss's law gives a quantitative answer to this question.
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
Electric Field at the Surface of a Conductor01:26

Electric Field at the Surface of a Conductor

Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
Gauss's Law in Dielectrics01:17

Gauss's Law in Dielectrics

Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
Electric Field of Parallel Conducting Plates01:16

Electric Field of Parallel Conducting Plates

Gauss' law relates the electric flux through a closed surface to the net charge enclosed by that surface. Gauss's law can be applied to find the electric field and the charge enclosed in a region depending on its charge distribution.
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric field, the...

You might also read

Related Articles

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

Sort by
Same author

Electronic Hong Ou Mandel interferences to unveil the 2/3 fractional quantum Hall edge channel dynamics.

Nature communications·2025
Same author

Coulomb Sensing of Single Ballistic Electrons.

Physical review letters·2025
Same author

On-Chip Quantum Sensing of Kondo Spins in a High-Mobility Quasi-One-Dimensional Nanoconstriction.

Nano letters·2025
Same author

Spin-photon entanglement with direct photon emission in the telecom C-band.

Nature communications·2024
Same author

Coherent light scattering from a telecom C-band quantum dot.

Nature communications·2023
Same author

Time-resolved Coulomb collision of single electrons.

Nature nanotechnology·2023

Related Experiment Video

Updated: Jul 20, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

Conductance quantization at a half-integer plateau in a symmetric GaAs quantum wire.

R Crook1, J Prance, K J Thomas

  • 1Cavendish Laboratory, 19 JJ Thomson Avenue, Cambridge CB3 0HE, UK. rc230@cam.ac.uk

Science (New York, N.Y.)
|June 3, 2006
PubMed
Summary

Researchers discovered a new conductance plateau in gallium arsenide (GaAs) quantum wires. This finding suggests spontaneous spin-polarization, potentially advancing spintronics without external magnetic fields.

More Related Videos

Analysis of Contact Interfaces for Single GaN Nanowire Devices
11:13

Analysis of Contact Interfaces for Single GaN Nanowire Devices

Published on: November 15, 2013

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

Related Experiment Videos

Last Updated: Jul 20, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

Analysis of Contact Interfaces for Single GaN Nanowire Devices
11:13

Analysis of Contact Interfaces for Single GaN Nanowire Devices

Published on: November 15, 2013

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

Area of Science:

  • Condensed Matter Physics
  • Quantum Phenomena
  • Spintronics

Background:

  • Quantum wires are nanoscale structures exhibiting unique electronic properties.
  • Understanding conductance quantization is crucial for developing quantum devices.
  • Spintronics aims to utilize electron spin for information processing.

Purpose of the Study:

  • To investigate anomalous conductance features in induced gallium arsenide (GaAs) quantum wires.
  • To explore the origin of a novel conductance plateau observed at 0.5(2e²/h).
  • To assess the potential of these findings for spintronic applications.

Main Methods:

  • Fabrication and characterization of induced gallium arsenide (GaAs) quantum wires.
  • Utilized low-temperature scanning-probe techniques to tune the potential landscape.
  • Performed source-drain energy spectroscopy and temperature response measurements.

Main Results:

  • Observed an additional conductance plateau at 0.5(2e²/h) in zero magnetic field.
  • The plateau was most prominent under symmetric potential landscape conditions.
  • Evidence suggests spontaneous spin-polarization (ferromagnetic phase) as the cause.

Conclusions:

  • The spontaneous spin-polarization in GaAs quantum wires offers a novel mechanism for conductance.
  • This phenomenon could enable the generation or detection of spin-polarized currents.
  • Potential applications in spintronics without requiring external magnetic fields or magnetic materials.