Probing the superconducting ground state of the rare-earth ternary boride superconductors R RuB 2 ( R = Lu,Y) using muon-spin rotation and relaxation
Probing the superconducting ground state of the rare-earth ternary boride superconductors R RuB 2 ( R = Lu,Y) using muon-spin rotation and relaxation
复制标题
利用μ子自旋旋转和弛豫探测稀土三元硼化物超导体R RuB 2 (R = Lu,Y)的超导基态
DOI：
10.1103/physrevb.97.094506
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发表时间：
2018
影响因子：
3.7
通讯作者：
Barker J
中科院分区：
文献类型：
--
作者：
Barker J
本文用μ子自旋转动和弛豫方法研究了稀土过渡金属三元硼化物的超导电性。在零场的测量表明，时间反演对称性在两种材料进入超导状态时都得到了保留;在两种化合物的超导转变上方和下方观察到去极化的微小差异，然而，这归因于准静态磁场波动。磁通线晶格的横向场测量表明，在这两种材料的超导性是完全带隙的，与传统的波配对对称性和BCS的大小为零温度的间隙能量。计算了Lu和Y化合物超导态载流子的电子性质，有效质量分别为和，超导载流子密度分别为和。这些材料已经根据Uemura超导性方案进行了分类，值为和，这意味着超导性在性质上可能不完全是常规的。
The superconductivity in the rare-earth transition-metal ternary borides(whereand Y) has been investigated using muon-spin rotation and relaxation. Measurements made in zero field suggest that time-reversal symmetry is preserved upon entering the superconducting state in both materials; a small difference in depolarization is observed above and below the superconducting transition in both compounds, however, this has been attributed to quasistatic magnetic fluctuations. Transverse-field measurements of the flux-line lattice indicate that the superconductivity in both materials is fully gapped, with a conventional-wave pairing symmetry and BCS-like magnitudes for the zero-temperature gap energies. The electronic properties of the charge carriers in the superconducting state have been calculated, with effective massesandin the Lu and Y compounds, respectively, with superconducting carrier densitiesand. The materials have been classified according to the Uemura scheme for superconductivity, with values forofand, implying that the superconductivity may not be entirely conventional in nature.