Particle-hole fluctuations and possible superconductivity in doped α-RuCl3

doi:10.1088/1674-1056/28/5/057402

中国物理B ›› 2019, Vol. 28 ›› Issue (5): 57402-057402.doi: 10.1088/1674-1056/28/5/057402

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃

Bin-Bin Wang(王斌斌), Wei Wang(王巍), Shun-Li Yu(于顺利), Jian-Xin Li(李建新)

1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

收稿日期:2019-01-30 修回日期:2019-03-19 出版日期:2019-05-05 发布日期:2019-05-05
通讯作者: Shun-Li Yu, Jian-Xin Li E-mail:slyu@nju.edu.cn;jxli@nju.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674158 and 11774152) and the National Key Projects for Research and Development of China (Grant No. 2016YFA0300401). W. Wang was also supported by the Program B for Outstanding PhD Candidate of Nanjing University.

Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃

Bin-Bin Wang(王斌斌)¹, Wei Wang(王巍)¹, Shun-Li Yu(于顺利)^1,2, Jian-Xin Li(李建新)^1,2

1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

Received:2019-01-30 Revised:2019-03-19 Online:2019-05-05 Published:2019-05-05
Contact: Shun-Li Yu, Jian-Xin Li E-mail:slyu@nju.edu.cn;jxli@nju.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674158 and 11774152) and the National Key Projects for Research and Development of China (Grant No. 2016YFA0300401). W. Wang was also supported by the Program B for Outstanding PhD Candidate of Nanjing University.

摘要/Abstract

摘要：

We study various particle-hole excitations and possible superconducting pairings mediated by these fluctuations in doped α-RuCl₃ 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.

关键词: superconductivity, particle-hole fluctuations, spin-orbit coupling, α-RuCl₃

Abstract:

Key words: superconductivity, particle-hole fluctuations, spin-orbit coupling, α-RuCl₃

中图分类号: (Pairing symmetries (other than s-wave))

74.20.Rp

75.10.Lp (Band and itinerant models) 71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 71.10.Fd (Lattice fermion models (Hubbard model, etc.))

王斌斌, 王巍, 于顺利, 李建新. Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃[J]. 中国物理B, 2019, 28(5): 57402-057402.

Bin-Bin Wang(王斌斌), Wei Wang(王巍), Shun-Li Yu(于顺利), Jian-Xin Li(李建新). Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃[J]. Chin. Phys. B, 2019, 28(5): 57402-057402.

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Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃

Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃

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