Layer zero-line modes in antiferromagnetic topological insulators
Recently, the magnetic domain walls have been experimentally observed in antiferromagnetic topological insulators MnBi$_2$Te$_4$, where we find that the topological zero-line modes (ZLMs) appear along the domain walls. Here, we theoretically demonstrate that these ZLMs are layer-dependent in MnBi...
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المؤلفون الرئيسيون: | , , , , , |
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مؤلفون آخرون: | |
التنسيق: | مقال |
اللغة: | English |
منشور في: |
2023
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الموضوعات: | |
الوصول للمادة أونلاين: | https://hdl.handle.net/10356/169896 |
الوسوم: |
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الملخص: | Recently, the magnetic domain walls have been experimentally observed in
antiferromagnetic topological insulators MnBi$_2$Te$_4$, where we find that the
topological zero-line modes (ZLMs) appear along the domain walls. Here, we
theoretically demonstrate that these ZLMs are layer-dependent in MnBi$_2$Te$_4$
multilayers. For domain walls with out-of-plane ferromagnetism, we find that
ZLMs are equally distributed in the odd-number layers. When domain walls
possess in-plane magnetization, the ZLMs can also exist in even-number layers
due to in-plane mirror-symmetry breaking. Moreover, the conductive channels are
mainly distributed in the outermost layers with increasing layer thickness. Our
findings lay out a strategy in manipulating ZLMs and also can be utilized to
distinguish the corresponding magnetic structures. |
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