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

Types Of Superconductors01:28

Types Of Superconductors

A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
Magnetic Field due to Moving Charges01:23

Magnetic 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...
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

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...

You might also read

Related Articles

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

Sort by
Same author

Controllable valley filter in graphene topological line defect with magnetic field.

Journal of physics. Condensed matter : an Institute of Physics journal·2020
Same author

Anomalous quantized conductance in a half-metal/topological superconductor/half-metal junction.

Journal of physics. Condensed matter : an Institute of Physics journal·2014
Same author

Reaction of cytochrome bo3 with oxygen: extra redox center(s) are present in the protein.

Biochemistry·1995
Same author

Regulation of striatal cyclic-3',5'-adenosine monophosphate accumulation and GABA release by glutamate metabotropic and dopamine D1 receptors.

The Journal of pharmacology and experimental therapeutics·1995
Same author

Calculation of relative binding free energies and configurational entropies: a structural and thermodynamic analysis of the nature of non-polar binding of thrombin inhibitors based on hirudin55-65.

Journal of molecular biology·1995
Same author

Hydroxylated aromatic inhibitors of HIV-1 integrase.

Journal of medicinal chemistry·1995

Related Experiment Video

Updated: May 11, 2026

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

Supercurrent modulated by magnetization in a composite topological superconductor junction.

C D Ren1, Y H Yang, J Wang

  • 1Department of Physics, Southeast University, Nanjing 210096, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 1, 2013
PubMed
Summary

Magnetization in a quantum dot junction can induce a supercurrent without a phase gradient. This zero-phase supercurrent, crucial for detecting Majorana fermions, is tunable via magnetization direction and strength.

More Related Videos

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
04:51

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

Published on: July 8, 2021

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
09:01

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Related Experiment Videos

Last Updated: May 11, 2026

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

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
04:51

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

Published on: July 8, 2021

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
09:01

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics
  • Materials Science

Background:

  • Topological superconductors (TS) exhibit exotic quantum phenomena.
  • Understanding supercurrent flow in hybrid structures is key to novel electronics.
  • Quantum dots offer tunable platforms for exploring quantum phenomena.

Purpose of the Study:

  • To theoretically investigate supercurrent in a composite topological superconductor (TS) junction with a magnetized quantum dot.
  • To analyze the influence of magnetization on the current-phase relationship.
  • To explore a potential method for detecting Majorana fermions.

Main Methods:

  • Tight-binding model.
  • Keldysh Green's function method.
  • Theoretical analysis of supercurrent in a TS-dot-TS junction.

Main Results:

  • Magnetization in the quantum dot significantly modifies the supercurrent-current-phase relationship.
  • A nonzero supercurrent flows at zero phase gradient when magnetization has a specific orientation.
  • The induced zero-phase supercurrent is controllable by magnetization magnitude and direction.
  • Maximum supercurrent occurs at the critical magnetic field for topological phase transition.

Conclusions:

  • Magnetization in a quantum dot provides a tunable knob to control supercurrent in TS junctions.
  • The induced zero-phase supercurrent offers a promising, experimentally accessible route for Majorana fermion detection.