Related Experiment Video
Updated: Aug 4, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
9.7K
Long-range skin Josephson supercurrent across a van der Waals ferromagnet
Guojing Hu1, Changlong Wang1, Shasha Wang1
1Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, 230026, Hefei, China.
Nature Communications
|March 30, 2023
Summary
Researchers achieved long-range spin-triplet supercurrents in superconducting spintronics using 2D materials. This breakthrough enables dissipationless quantum devices with supercurrents extending over 300nm.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Spintronics
Background:
- Superconducting spintronics aims for energy-efficient quantum devices.
- Spin-singlet supercurrents decay rapidly in ferromagnets.
- Spin-triplet supercurrents offer longer transport but are rarely observed.
Purpose of the Study:
- To realize and investigate long-range spin-triplet supercurrents.
- To explore the use of van der Waals materials in superconducting spintronics.
- To demonstrate accurate interface control in superconductor/ferromagnet heterostructures.
Main Methods:
- Fabrication of lateral superconductor/ferromagnet/superconductor (S/F/S) Josephson junctions.
- Utilizing the van der Waals ferromagnet Fe3GeTe2 and superconductor NbSe2.
- Characterization of supercurrent transport and quantum interference in magnetic fields.
Main Results:
- Achieved supercurrent transport over 300nm in the ferromagnet.
- Observed distinct quantum interference patterns indicative of triplet correlations.
- Demonstrated pronounced "skin" characteristics of the supercurrent, peaked at interfaces.
Conclusions:
- Established a viable platform for long-range spin-triplet supercurrents using 2D van der Waals materials.
- Highlighted the potential of Fe3GeTe2/NbSe2 heterostructures for advanced quantum devices.
- Provided new insights into the interplay of superconductivity and spintronics in layered materials.
More Related Videos
Related Concept Videos
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
01:13Magnetic Force Between Two Parallel Currents
3.6K
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...
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...
3.6K
01:23Magnetic Field due to Moving Charges
8.9K
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...
8.9K
01:28Magnetic Field Due To A Thin Straight Wire
4.9K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
4.9K
01:26Electric Field at the Surface of a Conductor
4.7K
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...
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...
4.7K
01:16Magnetic Field Of A Current Loop
4.7K
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.
4.7K