论文标题
疾病在超氟$^3 $ He的手性阶段引起异常热厅效应
Disorder Induced Anomalous Thermal Hall Effect in Chiral Phases of Superfluid $^3$He
论文作者
论文摘要
NMR在液体$^3 $上进行的实验，他注入了单透视二氧化硅气凝胶，显示出从正常相冷却时，在冷却时稳定了两个相等的旋转对手性阶段。手性轴相对于这些相的各向异性轴的比对取决于温度。当$^3 $时，他被稳定在$ d \ simξ$（超流体相干长度）时，也可以稳定。对于两种类型的限制，通过随机电势（气凝胶或表面）散射准粒子是一对破裂，并产生了准粒子状态的亚间隙密度。随机场还与手性秩序参数共谋，以生成正常与手性轴的平面中准粒子的偏斜散射。这种散射机制导致了由热梯度驱动的非平衡准粒子的异常热厅的传输。我们报告了针对各向异性气凝胶和板的$^3 $ HE的理论模型的异常导热室电导率的理论结果。异常的热大厅效应（ATHE）提供了一个重要的工具，可以识别手性超导体/超级流体中损坏的时间反转和镜子对称性和拓扑的特征。
NMR experiments on liquid $^3$He infused into uniaxially anisotropic silica aerogels show the stabilisation of two equal-spin-pairing chiral phases on cooling from the normal phase. The alignment of the chiral axis relative to the anisotropy axis for these phases is predicted to depend upon temperature. A chiral A-like phase is also stabilized when $^3$He is confined to a slab of thickness $D\sim ξ$, the superfluid coherence length. For both types of confinement, scattering of quasiparticles by the random potential - aerogel or surface - is pair breaking and generates a sub-gap density of quasiparticle states. The random field also conspires with the chiral order parameter to generate skew scattering of quasiparticles in the plane normal to the chiral axis. This scattering mechanism leads to anomalous thermal Hall transport for nonequilibrium quasiparticles driven by a thermal gradient. We report theoretical results for the anomalous thermal Hall conductivity for theoretical models for chiral phases of $^3$He in both anisotropic aerogel and slabs. The anomalous thermal Hall effect (ATHE) provides an important tool to identify signatures of broken time-reversal and mirror symmetries and topology in chiral superconductors/superfluids.
