Related Experiment Video
Updated: Apr 6, 2026
08:58
Silicon Nanowires and Optical Stimulation for Investigations of Intra- and Intercellular Electrical Coupling
Published on: January 28, 2021
5.0K
Double Path Interference and Magnetic Oscillations in Cooper Pair Transport through a Single Nanowire
S V Mironov1,2, A S Mel'nikov2,3, A I Buzdin1
1University Bordeaux, LOMA UMR-CNRS 5798, F-33405 Talence Cedex, France.
Physical Review Letters
|July 22, 2015
Summary
We demonstrate that Josephson junctions with two conductive channels in a nanowire exhibit multiperiodic magnetic oscillations. This phenomenon arises from quantum interference influenced by spin-orbit coupling and Zeeman interaction.
Area of Science:
- Condensed Matter Physics
- Quantum Mechanics
- Materials Science
Background:
- Josephson junctions are crucial for quantum electronics.
- Understanding interference phenomena in superconducting transport is key.
- Recent observations in Bismuth (Bi) nanowires show complex interference patterns.
Purpose of the Study:
- To explain the origin of multiperiodic magnetic oscillations in Josephson junctions.
- To model the interference phenomena in superconducting nanowires.
- To provide a theoretical framework for observed complex transport behaviors.
Main Methods:
- Theoretical modeling of a Josephson junction with two conductive channels.
- Analysis of quantum mechanical interference effects.
- Inclusion of spin-orbit coupling and Zeeman interaction in the model.
Main Results:
- The critical current of the Josephson junction reveals multiperiodic magnetic oscillations.
- Multiperiodicity is explained by quantum interference between two channels.
- The model successfully accounts for interference in Bi nanowires.
Conclusions:
- A minimal two-channel model explains complex interference in Josephson transport.
- Spin-orbit coupling and Zeeman interaction are critical for multiperiodic oscillations.
- The findings offer insights into quantum transport in superconducting nanostructures.
Related Concept Videos
01:18Magnetic Field Due to Two Straight Wires
5.4K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
5.4K
01:27Magnetic Field Due To A Thin Straight Wire
6.7K
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.
6.7K
01:23Magnetic Field due to Moving Charges
12.5K
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...
12.5K
01:13Magnetic Force Between Two Parallel Currents
5.1K
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...
5.1K
01:22Magnetic Force On Current-Carrying Wires: Example
2.5K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
2.5K
01:13Torque On A Current Loop In A Magnetic Field
6.6K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
6.6K