论文标题
YPDBI薄膜中拓扑非平地的应变驱动的出现
Strain driven emergence of topological non-triviality in YPdBi thin films
论文作者
论文摘要
半母勒化合物具有出色的新出现特性，例如重毛皮行为，非常规的超导性和磁性。这些化合物中有几种被预测为托管拓扑非平凡的电子结构。值得注意的是，最近的理论研究表明，有可能通过应变工程在原本琐碎的半身系统中诱导非平凡的拓扑表面状态。在这里，使用磁通型传输测量和基于DFT的第一原理模拟，我们在（100）MGO上生长的Ypdbi的py薄膜上表现出拓扑表面状态[110]。这些拓扑表面状态出现在原本琐碎的半金属中，纯粹由应变驱动。此外，我们观察到这些紧张的膜中超导性的发作，突出了设计拓扑超导状态的可能性。我们的结果表明，在薄膜系统中，劳力在工程新拓扑状态中所起的关键作用，用于开发下一代自旋设备。
Half-Heusler compounds exhibit a remarkable variety of emergent properties such as heavy-fermion behaviour, unconventional superconductivity and magnetism. Several of these compounds have been predicted to host topologically non-trivial electronic structures. Remarkably, recent theoretical studies have indicated the possibility to induce non-trivial topological surface states in an otherwise trivial half-Heusler system by strain engineering. Here, using magneto-transport measurements and first principles DFT-based simulations, we demonstrate topological surface states on strained [110] oriented thin films of YPdBi grown on (100) MgO. These topological surface states arise in an otherwise trivial semi-metal purely driven by strain. Furthermore, we observe the onset of superconductivity in these strained films highlighting the possibility of engineering a topological superconducting state. Our results demonstrate the critical role played by strain in engineering novel topological states in thin film systems for developing next-generation spintronic devices.
