论文标题
复合NAV2O4中的结构，相位稳定性，半金属性和完全自旋极化的Weyl状态：拓扑旋转材料的新示例
Structure, phase stability, half-metallicity, and fully spin-polarized Weyl states in compound NaV2O4: a new example for topological spintronic material
论文作者
论文摘要
在这里，我们系统地研究了新的拓扑型材料NAV2O4的结构，相位稳定性，半金属性和拓扑电子结构。该材料具有具有出色的动力学和热稳定性的四方结构。它显示了半金属的基础状态，其中只有在费米水平附近的旋转带。这些频段形成靠近费米水平的Weyl节点线，位于Kz = 0平面。在镜子对称性的保护下，节点线反对SOC。节点线带结构非常干净，因此可以清楚地识别鼓头表面状态。值得注意的是，节点线和鼓头表面状态具有100％自旋极化，这对于Spintronics应用非常可取。另外，通过将磁场移动面内，我们发现Weyl节点线可以转变为单对Weyl节点。散装中的Weyl线和Weyl-node Fermions以及表面上的鼓头费米是完全自旋的偏振，这可能会产生新的物理性能和有希望的应用。
Here, we systematically investigate the structure, phase stability, half-metallicity, and topological electronic structure for a new topological spintronic material NaV2O4. The material has a tetragonal structure with excellent dynamical and thermal stabilities. It shows a half-metallic ground state, where only the spin-up bands present near the Fermi level. These bands form a Weyl nodal line close to the Fermi level, locating in the kz = 0 plane. The nodal line is robust against SOC, under the protection of the mirror symmetry. The nodal line band structure is very clean, thus the drumhead surface states can be clearly identified. Remarkably, the nodal line and drumhead surface states have the 100% spin polarization, which are highly desirable for spintronics applications. In addition, by shifting the magnetic field in-plane, we find that the Weyl nodal line can transform into single pair of Weyl nodes. The Weyl-line and Weyl-node fermions in the bulk, as well as the drumhead fermions on the surface are all fully spin-polarized, which may generate new physical properties and promising applications.
