Variation of zero-energy density of states of a d-wave superconductor in a rotating in-plane magnetic field: Effect of nonmagnetic impurities
Variation of zero-energy density of states of a d-wave superconductor in a rotating in-plane magnetic field: Effect of nonmagnetic impurities
复制标题
旋转面内磁场中 d 波超导体零能量态密度的变化：非磁性杂质的影响
DOI：
10.1103/physrevb.101.060501
复制
发表时间：
2020
影响因子：
3.7
通讯作者：
Ichioka Masanori
中科院分区：
文献类型：
--
作者：
Hashitani Yuuki;Tanaka Kenta K.;Adachi Hiroto;Ichioka Masanori
利用面内磁场旋转下零能态密度的振荡来确定超导带隙的节点位置。基于能恰当地捕捉涡旋核贡献的Eilenberger理论，在玻恩极限和么正极限下，定量地研究了α波超导体中杂质散射对振荡的影响.我们发现在低场下杂质散射可以改变振荡的符号，这表明杂质效应是角分辨比热测量分析中的一个重要因素。
Oscillation of zero-energy density of states under the rotation of an in-plane magnetic field is used to identify node positions of the superconducting gap. Based on Eilenberger theory that can capture the vortex core contribution appropriately, we quantitatively study the effects of nonmagnetic impurity scattering on the oscillation in a-wave superconductor, as a function of the magnetic field and the scattering rate in the Born and the unitary limits. We find that the sign of the oscillation can be changed by the impurity scattering at low fields, indicating that impurity effect is an important factor in the analysis of angle-resolved specific heat measurements.