Topological magnetization jumps in a confined chiral soliton lattice
Topological magnetization jumps in a confined chiral soliton lattice
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DOI：
10.1103/physrevb.89.014419
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发表时间：
2014-01-22
影响因子：
3.7
通讯作者：
Sinitsyn, Vl. E.
中科院分区：
文献类型：
--
作者：
Kishine, Jun-ichiro;Bostrem, I. G.;Sinitsyn, Vl. E.
我们证明了在具有固定边界条件的手性螺旋网中形成的有限尺寸手性孤子晶格在垂直于手性轴的磁场作用下表现出磁化跳变的响应。施加的边界条件导致了拓扑电荷的限制和孤子晶格的量子化空间周期。建立属于不同拓扑扇区的基态能量包络，我们发现磁化跳变与水平交叉有关。在数值建立量化条件后，我们还建立了场理论模型来支持数值结果。
We demonstrate that a finite-size chiral soliton lattice formed in a chiral helimagnet with fixed boundary conditions exhibits magnetization jumps in a response to the magnetic field applied perpendicular to the chiral axis. The imposed boundary conditions lead to confinement of topological charges and quantized spatial periods of the soliton lattice. Building an envelope of the ground-state energies belonging to different topological sectors, we find the magnetization jumps related with the level crossing. After numerically establishing the quantization condition, we also develop a field-theoretical model to support the numerical results.