Domain walls that do not get stuck on impurities
Domain walls that do not get stuck on impurities
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不会被杂质粘住的畴壁
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Wereszczynski
中科院分区：
文献类型：
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作者：
C. Adam;K. Oleś;T. Romańczukiewicz;A. Wereszczynski
我们提出了一个场理论模型，该模型允许畴壁不被杂质粘住。为此，我们考虑了一个具有杂质的广义手性磁畴壁作用，它与势项和Dzyaloshinskii-Moriya相互作用能都耦合。我们发现，在所谓的临界耦合限制下，两种类型的畴壁之间的相互作用能和杂质消失。因此，在低速时，这些畴壁可以自由地穿过杂质，几乎没有能量损失。
We present a field theoretical model which allows for domain walls that do not get stuck on impurities. For this purpose, we consider a generalized chiral magnet domain wall action with an impurity which couples both to a potential term as well as to the Dzyaloshinskii-Moriya interaction energy. We show that in the so-called critical coupling limit the interaction energy between two types of domain walls and the impurity vanishes. Therefore, at low velocity, such domain walls pass freely through the impurity with almost no loss of energy.