漫游电子对手征孤子晶格的锁定
Lock-in of a Chiral Soliton Lattice by Itinerant Electrons
摘要：
手征磁体通常表现出与其独特的自旋织构相关的有趣的磁性和输运性质。一个典型的例子是手征孤子晶格，其存在于单轴手征磁体中，例如在垂直于手征轴的外部磁场中的CrNb $_3$ S $_6$和Yb（Ni $_{1-x}$ Cu $_x$）$_3$ Al $_9$。本文采用最小巡游电子模型，从理论上研究了手征孤子晶格中的电磁性质。利用变分计算，我们发现，手征孤子晶格的周期可以锁定在特定的值所规定的费米波数，在鲜明的对比，仅自旋模型。我们讨论了这种行为所造成的自旋-电荷耦合作为一个可能的机制，发现在Yb（Ni $_{1-x}$ Cu $_x$）$_3$ Al $_9$中的锁定。我们还表明，相同的机制导致自发形成的手征孤子晶格，即使在没有磁场。
英文摘要：
Chiral magnets often show intriguing magnetic and transport properties associated with their peculiar spin textures. A typical example is a chiral soliton lattice, which is found in monoaxial chiral magnets, such as CrNb$_3$S$_6$ and Yb(Ni$_{1-x}$Cu$_x$)$_3$Al$_9$ in an external magnetic field perpendicular to the chiral axis. Here, we theoretically investigate the electronic and magnetic properties in the chiral soliton lattice by a minimal itinerant electron model. Using variational calculations, we find that the period of the chiral soliton lattice can be locked at particular values dictated by the Fermi wave number, in stark contrast to spin-only models. We discuss this behavior caused by the spin-charge coupling as a possible mechanism for the lock-in discovered in Yb(Ni$_{1-x}$Cu$_x$)$_3$Al$_9$. We also show that the same mechanism leads to the spontaneous formation of the chiral soliton lattice even in the absence of the magnetic field.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
