论文标题
杂质引起的手性超导体中异常热厅效应
Impurity-Induced Anomalous Thermal Hall Effect in Chiral Superconductors
论文作者
论文摘要
手性超导体表现出新的运输特性，这些特性取决于顺序参数的拓扑，费米表面的拓扑，散装和边缘费米尼激发的光谱以及杂质潜能的结构。在电子热传输的情况下，杂质会引起异常（零场）的热厅电导率，该热量霍尔电导率很容易比量化的边缘贡献大的数量级。该作用起源于通过潜在散射引起的手性阶参数对Bogoliubov准粒子的分支转化散射。前者在冷凝物和传输热量的激发之间转移角动量。表明异常的热大厅电导率取决于手性订单参数的电子障碍电位的结构以及$δ（p）= |δ（p）| \，e^{inν(p）_ {p}} $。该结果提供了用于解释寻求识别T和P对称性破裂的热传输实验的定量公式，以及手性超导体的顺序参数的拓扑。
Chiral superconductors exhibit novel transport properties that depend on the topology of the order parameter, topology of the Fermi surface, the spectrum of bulk and edge Fermionic excitations, and the structure of the impurity potential. In the case of electronic heat transport, impurities induce an anomalous (zero-field) thermal Hall conductivity that is easily orders of magnitude larger than the quantized edge contribution. The effect originates from branch-conversion scattering of Bogoliubov quasiparticles by the chiral order parameter, induced by potential scattering. The former transfers angular momentum between the condensate and the excitations that transport heat. The anomalous thermal Hall conductivity is shown to depend to the structure of the electron-impurity potential, as well as the winding number, $ν$, of the chiral order parameter, $Δ(p)=|Δ(p)|\,e^{iνϕ_{p}}$. The results provide quantitative formulae for interpreting heat transport experiments seeking to identify broken T and P symmetries, as well as the topology of the order parameter for chiral superconductors.
