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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 |
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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.
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Received: 30 January 2019
Revised: 19 March 2019
Accepted manuscript online:
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PACS:
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74.20.Rp
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(Pairing symmetries (other than s-wave))
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75.10.Lp
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(Band and itinerant models)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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71.10.Fd
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(Lattice fermion models (Hubbard model, etc.))
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| 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
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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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