论文标题
ZRTE5中红外声子引起的宽敞开放费弧和连通性变化
Expansive Open Fermi Arcs and Connectivity Changes Induced by Infrared Phonons in ZrTe5
论文作者
论文摘要
覆盖大部分表面布里鲁因区域（SBZ）的宽敞开放式费米（SBZ）是可取的，可用于检测和控制许多拓扑现象，但到目前为止，仅报道了Kramers-Weyl点或非常规的手性手传效率，或以时间反向不变的速度不变的动力固定在流程材料中。 Here using first-principles band structure calculations, we show that for conventional Weyl points in ZrTe5 with the chirality of +1/-1 near the BZ center at general momentum induced by one of the infrared phonons, the second lowest B1u mode for breaking inversion symmetry, they can also form expansive open Fermi arcs across the SBZ boundary to occupy most of the SBZ when projected on (001) surface.我们揭示了这种膨胀的开放式费米弧是从拓扑表面状态演变而成的，这些状态连接了拓扑绝缘体阶段（001）表面上没有晶格失真的（001）表面上的多个表面狄拉克点。此外，我们发现可以通过此红外声子的晶格失真的大小来改变感应开放的费米弧的连通性。因此，我们提出，使用相干的光语音来调节晶格参数可以提供诱导新型拓扑特征的方法，包括扩展的开放式费米弧和动态控制ZRTE5中的费米电弧连接性。
Expansive open Fermi arcs covering most of the surface Brillouin zone (SBZ) are desirable for detection and control of many topological phenomena, but so far has been only reported for Kramers-Weyl points, or unconventional chiral fermions, pinned at time-reversal invariant momentum in chiral materials. Here using first-principles band structure calculations, we show that for conventional Weyl points in ZrTe5 with the chirality of +1/-1 near the BZ center at general momentum induced by one of the infrared phonons, the second lowest B1u mode for breaking inversion symmetry, they can also form expansive open Fermi arcs across the SBZ boundary to occupy most of the SBZ when projected on (001) surface. We reveal that such expansive open Fermi arcs are evolved from the topological surface states that connect multiple surface Dirac points on the (001) surface of the topological insulator phases without lattice distortion in ZrTe5. Furthermore, we find that the connectivity of the induced open Fermi arcs can be changed by the magnitude of the lattice distortion of this infrared phonon mode. Thus, we propose that using coherent optical phonon to modulate lattice parameters can offer ways to induce novel topological features including expansive open Fermi arcs and dynamically control Fermi arcs connectivity in ZrTe5.
