Particle-hole fluctuations and possible superconductivity in doped alpha-RuCl3
Particle-hole fluctuations and possible superconductivity in doped alpha-RuCl3
复制标题
掺杂 α-RuCl3 中的粒子孔波动和可能的超导性
DOI：
10.1088/1674-1056/28/5/057402
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Li Jian-Xin
中科院分区：
文献类型：
--
作者：
Wang Bin-Bin;Wang Wei;Yu Shun-Li;Li Jian-Xin
采用多带Hubbard模型，研究了掺杂α-RuCl 3中各种粒子-空穴激发以及由这些涨落介导的可能的超导配对.通过随机相位近似（RPA）分析，我们发现在所有的粒子-空穴激发中，jeff = 1/2的赝自旋涨落占主导地位，这表明即使在掺杂系统中，jeff = 1/2的图像也是鲁棒的.我们还发现最有利的超导态具有d波配对对称性。
We study various particle–hole excitations and possible superconducting pairings mediated by these fluctuations in doped α-RuCl 3 by using multi-band Hubbard model with all t 2g orbitals. By performing a random-phase-approximation (RPA) analysis, we find that among all particle–hole excitations, the j eff= 1/2 pseudospin fluctuations are dominant, suggesting the robustness of j eff= 1/2 picture even in the doped systems. We also find that the most favorable superconducting state has a d-wave pairing symmetry.