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, $\nu$, of the chiral order parameter, $\Delta(p)=|\Delta(p)|\,e^{i\nu\phi_{\p}}$. 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.

中文翻译：

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手性超导体中杂质引起的异常热霍尔效应

手性超导体展现出新颖的传输特性，该特性取决于顺序参数的拓扑，费米表面的拓扑，体和边缘费米离子激发的光谱以及杂质势的结构。在电子传热的情况下，杂质会引起异常（零场）的霍尔热导率，该电导率很容易比量化的边贡献大几个数量级。该效应源自通过手性有序参数引起的Bogoliubov准粒子的支化转化散射，是由潜在的散射引起的。前者在凝结水和传递热量的激励之间传递角动量。霍尔热传导率异常取决于电子杂质势的结构以及绕组数，$\nu$，则为$ \ Delta（p）= | \ Delta（p）| \，e ^ {i \ nu \ phi _ {\ p}} $。结果提供了用于解释热传输实验的定量公式，以试图确定断裂的T和P对称性，以及手性超导体的阶跃参数拓扑。