Skyrmions and Merons

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Skyrmions and Merons

帖子 TheMatrix楼主 »

Skyrmion is a type of topological soliton, which is a localized stable particle-like configuration of a field in a material or in a system of interacting particles. Specifically, a skyrmion is a three-dimensional magnetic structure that has a characteristic swirling pattern of spins, typically found in magnetic materials.

Skyrmions are formed by the interaction between the spin of electrons and the magnetic field of a material. They are particularly interesting because they can be controlled and manipulated with small electric currents, making them a promising candidate for information storage and processing in next-generation magnetic memory devices.

Skyrmions were first theorized by the physicist Tony Skyrme in the 1960s as a way to describe the behavior of certain subatomic particles. They were later discovered in magnetic materials in 2009, and since then, there has been a great deal of research into their properties and potential applications.
上次由 TheMatrix 在 3月 15, 2023, 4:04 pm,总共编辑 1 次。
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Re: Skyrmions and Merons - ChatGPT answers

帖子 TheMatrix楼主 »

Merons are another type of topological soliton, similar to skyrmions, but with a different pattern of spin orientations. While skyrmions have a swirling pattern of spins that gives them a topological charge, merons have a half-integer topological charge due to their two-point vortices.

In a magnetic material, merons appear as localized regions of opposite spin orientation that are separated by a domain wall. These structures can form spontaneously due to the interaction between the magnetic field and the spin of electrons in the material, and can be manipulated with small electric currents, much like skyrmions.

Merons have been observed in a variety of magnetic materials, including thin films and multilayers, and have also been proposed as a potential candidate for information storage and processing in magnetic memory devices. However, compared to skyrmions, the research on merons is relatively new, and their properties and potential applications are still being explored.
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Re: Skyrmions and Merons - ChatGPT answers

帖子 TheMatrix楼主 »

Skyrmions are a type of magnetic quasiparticle that can form in certain materials. They are characterized by a spin texture that is topologically protected, which means that it is resistant to perturbations and can persist even in the presence of defects or imperfections in the material. Skyrmions can be thought of as tiny magnetic vortices or whirls, with a specific pattern of spin orientations that give them stability.

Skyrmions have attracted a lot of interest in recent years because of their potential applications in spintronics, a field that seeks to use the spin of electrons to store and process information. Skyrmions have several advantages over traditional magnetic storage technologies, including their small size, low energy consumption, and resistance to external magnetic fields.

Skyrmions were originally proposed by the physicist Tony Skyrme in the context of particle physics, but their existence was later confirmed in magnetic materials. They have since been observed in a variety of materials, including metals, semiconductors, and insulators, and researchers continue to explore their properties and potential applications.
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Re: Skyrmions and Merons - ChatGPT answers

帖子 TheMatrix楼主 »

Merons are a type of topological soliton or quasiparticle that can occur in two-dimensional materials. They are similar to skyrmions in that they are characterized by a topologically protected spin texture, but unlike skyrmions, they have only half-integer spin and do not form a complete vortex. Instead, they have a half-integer topological charge and a spatially varying spin orientation that changes continuously across the material.

Merons were first proposed theoretically in the context of condensed matter physics, and have since been observed experimentally in magnetic materials and other systems. Like skyrmions, merons have potential applications in spintronics, and researchers are exploring ways to control and manipulate their properties.

One notable feature of merons is that they can exhibit emergent electromagnetic fields that are not directly related to any external magnetic field. This phenomenon is known as the spin Hall effect and could have important implications for the development of novel spintronic devices.
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Re: Skyrmions and Merons - ChatGPT answers

帖子 TheMatrix楼主 »

以下是Bing Chat的回答。更注重事实。各有各的优点吧。

Skyrmions are **swirling quasi-particles** that can be found in certain magnetic materials¹. They were first proposed by Tony Skyrme in 1961 as a way to model subatomic particles like protons and neutrons². Skyrmions have a **topological stability** that makes them resistant to deformation²³.

Source: Conversation with Bing, 3/14/2023(1) What Are Skyrmions? | Space. https://www.space.com/skyrmions.html Accessed 3/14/2023.
(2) Skyrmion - Wikipedia. https://en.wikipedia.org/wiki/Skyrmion Accessed 3/14/2023.
(3) Magnetic skyrmion - Wikipedia. https://en.wikipedia.org/wiki/Magnetic_skyrmion Accessed 3/14/2023.
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Re: Skyrmions and Merons - ChatGPT answers

帖子 TheMatrix楼主 »

TheMatrix 写了: 3月 14, 2023, 12:38 pm 以下是Bing Chat的回答。更注重事实。各有各的优点吧。

Skyrmions are **swirling quasi-particles** that can be found in certain magnetic materials¹. They were first proposed by Tony Skyrme in 1961 as a way to model subatomic particles like protons and neutrons². Skyrmions have a **topological stability** that makes them resistant to deformation²³.

Source: Conversation with Bing, 3/14/2023(1) What Are Skyrmions? | Space. https://www.space.com/skyrmions.html Accessed 3/14/2023.
(2) Skyrmion - Wikipedia. https://en.wikipedia.org/wiki/Skyrmion Accessed 3/14/2023.
(3) Magnetic skyrmion - Wikipedia. https://en.wikipedia.org/wiki/Magnetic_skyrmion Accessed 3/14/2023.
They were first proposed by Tony Skyrme in 1961 as a way to model subatomic particles like protons and neutrons².

那么早就想到用这个来model基本粒子了。我认为这是正确的。人类的思想是相通的。

不知道Skyrmion模型在亚原子基本粒子领域有没有得到发展和确认。
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Re: Skyrmions and Merons

帖子 TheMatrix楼主 »

基本粒子应该就是skyrmions。我也想到了。但是以前我不知道skyrmions是什么。

各种各样的“内禀”属性就可以解释了 - 有方向了。

而且基本粒子也不是点粒子了。空间也进一步可分。- 这都是符合认知的 - 至少是我的认知 - 我对微观的认知。
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Re: Skyrmions and Merons

帖子 FoxMe »

不懂
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Re: Skyrmions and Merons

帖子 TheMatrix楼主 »

这个图是artist representation。但是它最符合我的想象。

图片

这个是一个video,二维物体上的skyrmion,相当于一个准粒子:

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Re: Skyrmions and Merons

帖子 TheMatrix楼主 »

关键字:swirling, twisting, hurricane, topological, soliton.

Skyrmions are a type of **topological soliton** that can occur in certain **nonlinear field theories**². They are named after British nuclear physicist Tony Skyrme, who first proposed their existence in 1961 as a model of subatomic particles like protons and neutrons¹². Skyrmions can be described as **swirling quasi-particles**, **knots of twisting field lines**, or **subatomic hurricanes**¹. They have interesting properties such as stability, mobility, and low energy dissipation that make them potential candidates for applications in data storage and spintronics³.

Source: Conversation with Bing, 3/15/2023(1) Skyrmion - Wikipedia. https://en.wikipedia.org/wiki/Skyrmion Accessed 3/15/2023.
(2) What Are Skyrmions? | Space. https://www.space.com/skyrmions.html Accessed 3/15/2023.
(3) Unveiling the three-dimensional magnetic texture of skyrmion tubes. https://www.nature.com/articles/s41565-021-01031-x Accessed 3/15/2023.
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Re: Skyrmions and Merons

帖子 TheMatrix楼主 »

我艹。刚注意到ChatGPT的logo就是skyrmion啊。

图片

这个又叫Hopf fibration:
图片
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Re: Skyrmions and Merons

帖子 TheMatrix楼主 »

A team including researchers at Argonne and the National High Magnetic Field Laboratory (MagLab) discovered surprising properties in a magnetic material of iron, germanium and tellurium. This material is in the form of a thin sheet that is only a few to 10 atoms in thickness. It is called a 2D ferromagnet.

The team discovered that two kinds of magnetic fields can coexist in this ultrathin material. Scientists call them merons and skyrmions. They are like miniature swirling storm systems dotting the flat landscape of the ferromagnet. But they differ in their size and swirling behavior.

Known and studied for about 15 years, skyrmions are about 100 nanometers in size—approximately the same as a single virus molecule—and their magnetic fields flow in complicated patterns, resembling those of the strands of a knot in a rope. Only recently discovered, merons are roughly the same size and have magnetic fields that swirl around like whirlpools.

"Both skyrmions and merons are very stable because like firmly tied knots, they are difficult to untangle," said Luis Balicas, who holds a joint appointment at MagLab and Florida State University. "This stability along with their magnetic properties makes them attractive as carriers of information."

https://phys.org/news/2023-03-ultrasmal ... ining.html
rgg
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Re: Skyrmions and Merons

帖子 rgg »

TheMatrix 写了: 3月 16, 2023, 3:11 pm 我艹。刚注意到ChatGPT的logo就是skyrmion啊。

图片

这个又叫Hopf fibration:
图片
这伙人太有文化了.
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