论文标题
晶型拓扑超导体
Grain-boundary topological superconductor
论文作者
论文摘要
Majorana零模式（MZM）对于现代冷凝物理物理和量子信息至关重要，因为它们的非亚洲性质，从而提供了实现拓扑量子位的可能性。我们在这里表明，晶界（GB）缺陷可以托管拓扑超导体（SC），当浸入父二维间隙拓扑SC中，带有Fermi表面，带有一对同居MZM，并带有非零动量的Fermi表面。我们的提案的本质在于由于MZM旋转锁定在汉堡矢量的GB缺陷基本块（GB缺陷）基本块（单个晶状体位错）的磁场驱动的杂交。确实，正如我们通过数值和分析计算所示的那样，具有两个局部MZMS的GB拓扑SC在外部磁场的角度和幅度的有限范围内出现。我们的工作证明了基于缺陷的量子信息技术平台的可能性，并为将来的系统搜索打开了一条路线。
Majorana zero modes (MZMs) are of central importance for modern condensed matter physics and quantum information due their non-Abelian nature, which thereby offers the possibility of realizing topological quantum bits. We here show that a grain boundary (GB) defect can host a topological superconductor (SC), with a pair of cohabitating MZMs at its end when immersed in a parent two-dimensional gapped topological SC with the Fermi surface enclosing a nonzero momentum. The essence of our proposal lies in the magnetic-field driven hybridization of the localized MZMs at the elementary blocks of the GB defect, the single lattice dislocations, due to the MZM spin being locked to the Burgers vector. Indeed, as we show through numerical and analytical calculations, the GB topological SC with two localized MZMs emerges in a finite range of both the angle and magnitude of the external magnetic field. Our work demonstrates the possibility of defect-based platforms for quantum information technology and opens up a route for their systematic search in future.
