Department of Materials Science and Engineering, University of California, Berkeley, CA, USA.
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Nat Commun. 2023 Jun 23;14(1):3744. doi: 10.1038/s41467-023-39442-0.
Control and understanding of ensembles of skyrmions is important for realization of future technologies. In particular, the order-disorder transition associated with the 2D lattice of magnetic skyrmions can have significant implications for transport and other dynamic functionalities. To date, skyrmion ensembles have been primarily studied in bulk crystals, or as isolated skyrmions in thin film devices. Here, we investigate the condensation of the skyrmion phase at room temperature and zero field in a polar, van der Waals magnet. We demonstrate that we can engineer an ordered skyrmion crystal through structural confinement on the μm scale, showing control over this order-disorder transition on scales relevant for device applications.
控制和理解准粒子的集合对于实现未来的技术非常重要。特别是，与磁准粒子二维晶格相关的有序无序转变可能对输运和其他动态功能有重大影响。迄今为止，准粒子的集合主要在体晶体中或在薄膜器件中作为孤立的准粒子进行研究。在这里，我们研究了在极性范德瓦尔斯磁体中在室温零场下的准粒子相凝聚。我们证明，我们可以通过在微米尺度上的结构限制来设计有序的准粒子晶体，从而在与器件应用相关的尺度上控制这种有序无序转变。
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