论文标题
杂质散射对奇塔夫链边缘附近的奇数旋转三个配对的影响
Impact of impurity scattering on odd-frequency spin-triplet pairing near the edge of the Kitaev chain
论文作者
论文摘要
我们研究了Kitaev链模型，该模型是托管Majoraana fermion的拓扑超导体的最简单模型，在边缘看起来为零能量状态。我们通过分析地计算出半官能kitaev链的绿色功能，其在准经典制度内具有三角函数型杂质潜力，以获得诱导的奇数频率配对的空间依赖性。已经发现，如果杂质的位置距离边缘不远，则状态的局部密度（LDOS）和奇数频率自旋 - 旋转$ s $ s $ - 波对振幅的空间曲线是可调的，这是杂质潜能强度的函数。此外，发现零能量的LDO和低频奇数对振幅具有相同的空间依赖性。根据Majorana Fermions的波函数分析了零能量LDO的空间曲线。
We study a Kitaev chain model, which is the simplest model of topological superconductors hosting Majorana fermion, appearing as a zero-energy state at the edge. We analytically calculate the Green's function of the semi-infinite Kitaev chain with a delta-function-type impurity potential within the quasi-classical regime to obtain the spatial dependence of the induced odd-frequency pairing. It is found that if the position of the impurity is not far from the edge, the spatial profile of the local density of states (LDOS) and the odd-frequency spin-triplet $s$-wave pair amplitude is tunable as a function of the strength of the impurity potential. Moreover, the zero-energy LDOS and low-frequency odd-frequency pair amplitude are found to have the same spatial dependence. The spatial profile of the zero-energy LDOS is analyzed based on the wave function of Majorana fermions.
