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Orbital angular momentum in a topological superconductor with Chern number higher than 1

机译:陈数大于1的拓扑超导体中的轨道角动量。

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We investigate the bulk orbital angular momentum (AM) in a two-dimensional hole-doped topological superconductor (SC) which is composed of a hole-doped semiconductor thin film, a magnetic insulator, and an s-wave SC and is characterized by the Chern number C = -3. In the topological phase, L-z/N is strongly reduced from the intrinsic value by the non-particle-hole-symmetric edge states as in the corresponding chiral f-wave SCs when the spin-orbit interactions (SOIs) are small, while this reduction of L-z/N does not work for the large SOIs. Here L-z and N are the bulk orbital AM and the total number of particles at zero temperature, respectively. As a result, L-z/N is discontinuous or continuous at the topological phase transition depending on the strengths of the SOIs. We also discuss the effects of the edge states by calculating the radial distributions of the orbital AM.
机译:我们研究二维空穴掺杂拓扑超导体(SC)中的体轨道角动量(AM),该二维超导体由空穴掺杂半导体薄膜,磁绝缘体和s波SC组成,其特征在于陈值C = -3。在拓扑阶段,当自旋轨道相互作用(SOI)较小时,与相应的手性f波SC一样,Lz / N会通过非粒子-孔对称边缘状态从本征值中大大降低,而这种降低Lz / N的值不适用于大型SOI。在此,L-z和N分别是体轨道AM和零温度下的粒子总数。结果,取决于SOI的强度,L-z / N在拓扑相变处是不连续的或连续的。我们还通过计算轨道AM的径向分布来讨论边缘状态的影响。

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