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Chin. Phys. B, 2019, Vol. 28(5): 057402    DOI: 10.1088/1674-1056/28/5/057402
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
Abstract  

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 t2g orbitals. By performing a random-phase-approximation (RPA) analysis, we find that among all particle-hole excitations, the jeff=1/2 pseudospin fluctuations are dominant, suggesting the robustness of jeff=1/2 picture even in the doped systems. We also find that the most favorable superconducting state has a d-wave pairing symmetry.

Keywords:  superconductivity      particle-hole fluctuations      spin-orbit coupling      α-RuCl3  
Received:  30 January 2019      Revised:  19 March 2019      Published:  05 May 2019
PACS:  74.20.Rp (Pairing symmetries (other than s-wave))  
  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.))  
Fund: 

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.

Corresponding Authors:  Shun-Li Yu, Jian-Xin Li     E-mail:  slyu@nju.edu.cn;jxli@nju.edu.cn

Cite this article: 

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 2019 Chin. Phys. B 28 057402

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