论文标题
非富裕超导系统中的散装bogoliubov fermi弧
Bulk Bogoliubov Fermi arcs in non-Hermitian superconducting systems
论文作者
论文摘要
我们通过将常规超导体耦合到铁磁铁铅，并在应用外部Zeeman场时展示出异常点的出现，从而考虑了非热门超导系统。我们发现，根据非热性和Zeeman场，特殊点标记为零真实能量的线的末端，从而产生了拓扑保护和高度可调的大量费米亚弧，我们将其构成了bogoliubov fermi Arc，这是由于其超导性的性质而引起的。我们表明，这些散装的Bogoliubov Fermi弧是Hermitian拓扑相变的非富甲弧，但更为普遍，也可以通过大型光谱特征在实验中检测到。
We consider a non-Hermitian superconducting system by coupling a conventional superconductor to a ferromagnet lead and demonstrate the emergence of exceptional points when an external Zeeman field is applied. We discover that, depending on the non-Hermiticity and the Zeeman field, the exceptional points mark the ends of lines with zero real energy, thus giving rise to topologically protected and highly tunable bulk Fermi arcs, which we coin bulk Bogoliubov Fermi arcs due to their superconducting nature. We show that these bulk Bogoliubov Fermi arcs are the non-Hermitian counterparts of the Hermitian topological phase transition but are much more prevalent and also experimentally detectable through large spectral signatures.
