Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry
Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry
复制标题
时间反转对称性破缺的自旋三重态超导体中的热霍尔电导率
DOI：
10.1103/physrevb.95.024516
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发表时间：
2017
影响因子：
3.7
通讯作者：
and Manfred Sigrist
中科院分区：
文献类型：
--
作者：
Yoshiki Imai;Katsunori Wakabayashi;and Manfred Sigrist
受自旋三重态超导体的启发，研究了时间反演对称性破缺的几种对对称性下的霍尔热导率。在准粒子激发能隙完全打开的手征波相位中，霍尔热导率的温度依赖性有一个与拓扑性质直接相关的温度线性项和一个指数项，在Lifshitz转变附近表现出剧烈的变化.考察波态作为备选的候选者，d=Δ 0 z <$（kx 2 − ky 2）（kx±iky）和无隙准粒子激发，我们研究了热霍尔电导率的温度依赖性，其中对于前一个状态，热霍尔电导率具有二次依赖于温度，源于线性色散，除了线性和指数行为。所得结果可使我们区分中的手征波态和非手征波态。
Motivated by the spin-triplet superconductor, the thermal Hall conductivity is investigated for several pairing symmetries with broken time-reversal symmetry. In the chiral-wave phase with a fully opened quasiparticle excitation gap, the temperature dependence of the thermal Hall conductivity has a temperature linear term associated with the topological property directly and an exponential term, which shows a drastic change around the Lifshitz transition. Examining-wave states as alternative candidates with d=Δ0ẑ(kx2−ky2)(kx±iky) andwith gapless quasiparticle excitations, we study the temperature dependence of the thermal Hall conductivity, where for the former state the thermal Hall conductivity has a quadratic dependence on temperature, originating from the linear dispersions, in addition to linear and exponential behavior. The obtained result may enable us to distinguish between the chiral-wave and-wave states in.