论文标题
石墨烯中的受保护的拓扑结节环半准
Protected Topological Nodal Ring Semimetal in Graphene
论文作者
论文摘要
石墨烯是一种二维狄拉克半学，显示了其分散性与准粒子和Quasiholes或物质或物质和反物质的相关性的有趣特性。我们在石墨烯中引入了拓扑结节环半学，具有量化的量子霍尔响应，鲁棒的一维手性边缘模式以及用于准粒子的二次费米 - 液态光谱和散装中的准霍尔斯。通过与电子的两个自旋极化以及sublattice中的两个自旋极化相关的Z2对称性，在费米能量的散装条带变性受到保护，并在两个交叉特征态的sublattice中的双重正交结构和自旋量子数。该系统可能在纳米电子学和适用于频带理论的量子机械纠缠中应用。
Graphene is a two-dimensional Dirac semimetal showing interesting properties as a result of its dispersion relation with both quasiparticles and quasiholes or matter and anti-matter. We introduce a topological nodal ring semimetal in graphene with a quantized quantum Hall response, a robust one-dimensional chiral edge mode and a quadratic Fermi-liquid spectrum for the quasiparticles and quasiholes in the bulk. The bulk band degeneracy at the Fermi energy is protected through a Z2 symmetry related to the two spin polarizations of an electron and a double-orthogonality structure in the sublattice and spin quantum numbers of the two crossing eigenstates. The system may have applications in nano-electronics and in quantum mechanical entanglement applied to band theory.
