Related Experiment Video
Updated: Oct 4, 2025
07:42
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
Published on: December 15, 2021
3.2K
Single skyrmion true random number generator using local dynamics and interaction between skyrmions
Kang Wang1, Yiou Zhang2, Vineetha Bheemarasetty2
1Department of Physics, Brown University, Providence, RI, 02912, USA. kang_wang@brown.edu.
Nature Communications
|February 8, 2022
Summary
Local dynamics of magnetic skyrmions enable versatile computing. These skyrmions can act as random number generators and exhibit tunable coupling for advanced magnetic skyrmion devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Magnetic skyrmions are crucial for post-von Neumann computing.
- Effective control over skyrmion dynamics is essential for device implementation.
Purpose of the Study:
- To introduce local skyrmion dynamics for versatile computing functionalities.
- To demonstrate skyrmion state switching for random number generation.
- To investigate tunable coupling between neighboring skyrmions.
Main Methods:
- Simulating magnetic skyrmion behavior under thermal effects and local pinning centers.
- Analyzing skyrmion state switching between small and large configurations.
- Investigating the anti-correlated fluctuation dynamics of neighboring skyrmions.
Main Results:
- Local skyrmion dynamics enable robust true random number generation.
- Skyrmion switching probability and coupling strength are tunable via magnetic field and spin current.
- Neighboring skyrmions display anti-correlated fluctuation dynamics.
Conclusions:
- Local skyrmion dynamics offer effective control for versatile computing.
- Tunable skyrmion behavior paves the way for advanced magnetic skyrmion devices.
- This research advances the development of highly controllable magnetic skyrmion-based technologies.
Related Concept Videos
01:08Spin–Spin Coupling Constant: Overview
1.0K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.0K
01:28Symmetry in Maxwell's Equations
3.6K
Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
3.6K
01:30Dynamics of Circular Motion
14.5K
An object undergoing circular motion, like a race car, is accelerating because it is changing the direction of its velocity. This centrally directed acceleration is called centripetal acceleration. This acceleration acts along the radius of the curved path (thus is also referred to as radial acceleration).
Any acceleration must be produced by some force. Therefore, any force or combination of forces can cause centripetal acceleration. A few examples include the tension in the rope on a...
Any acceleration must be produced by some force. Therefore, any force or combination of forces can cause centripetal acceleration. A few examples include the tension in the rope on a...
14.5K
01:12Fermi Level Dynamics
372
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
372
00:59Atomic Nuclei: Nuclear Magnetic Moment
2.0K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
2.0K
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
1.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
1.3K