论文标题
蜂窝状磁铁中的扭曲引起的木农水平
Twist-induced magnon Landau levels in honeycomb magnets
论文作者
论文摘要
已知由弹性应变产生的晶格变形可在空间调节晶格上原子的波函数重叠，并可以大大改变准片粒的特性。在这里，我们阐述的是，二维蜂窝量子磁铁纳米管中的扭曲晶格变形等效于弹性量规场，从而引起了磁坚长的量化。当基态是铁磁性时，在木元带的中心会诱导分散性的狄拉克 - 兰道水平，而对于抗磁磁性纳米纤维，扭曲会导致镁质带顶部的分散等距的Landau水平。两种类型的Landau级别的分散体均在乐队理论的框架中得出。
Lattice deformation resulting from elastic strain is known to spatially modulate the wave function overlap of the atoms on the lattice and can drastically alter the properties of the quasiparticles. Here we elaborate that a twist lattice deformation in two-dimensional honeycomb quantum magnet nanoribbons is equivalent to an elastic gauge field giving rise to magnon Landau quantization. When the ground state is ferromagnetic, dispersive Dirac-Landau levels are induced in the center of magnon bands, while for antiferromagnetic nanoribbons, the twist results in dispersive equidistant Landau levels at the top of magnon bands. The dispersions for both types of Landau levels are derived in the framework of the band theory.
