| Original Articles |
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Features in Quasi-particle Excitations and Tunneling Spectra
due to Coupling to Spin Fluctuations in High-Tc Cuprates |
| ZHAO Li1,2;LI Jian-Xin2;GONG Chang-De2;ZHAO Bai-Ru1 |
| 1National Laboratory of Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2National Laboratory of Solid States of Microstructure and Department of Physics, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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ZHAO Li, LI Jian-Xin, GONG Chang-De et al 2002 Chin. Phys. Lett. 19 992-995 |
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Abstract In a self-consistent mean-field treatment of the two-dimensional t-t'-J model, we theoretically examine the coupling of in-plane quasi-particles to the antiferromagnetic spin fluctuations in high-Tc superconductors, which renormalizes the fermionic self-energy. We reproduce the characteristic peak-dip-hump structure observed not only in angle-resolved photoemission spectroscopy, but also in supperconductor-insulator-normal metal junction and scan tunneling microscopy experiments. We consider the evolution of this structure with doping. It is shown that this kind of coupling can account for many anomalous properties of high-Tc superconductor in superconducting states.
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| Keywords:
74.20.Mn
74.25.Jb
74.50.+r
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Published: 01 July 2002
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| PACS: |
74.20.Mn
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(Nonconventional mechanisms)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.50.+r
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(Tunneling phenomena; Josephson effects)
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