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
Features in Quasi-particle Excitations and Tunneling Spectra
due to Coupling to Spin Fluctuations in High-Tc Cuprates
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
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.
ZHAO Li;LI Jian-Xin;GONG Chang-De;ZHAO Bai-Ru. Features in Quasi-particle Excitations and Tunneling Spectra
due to Coupling to Spin Fluctuations in High-Tc Cuprates[J]. 中国物理快报, 2002, 19(7): 992-995.
ZHAO Li, LI Jian-Xin, GONG Chang-De, ZHAO Bai-Ru. Features in Quasi-particle Excitations and Tunneling Spectra
due to Coupling to Spin Fluctuations in High-Tc Cuprates. Chin. Phys. Lett., 2002, 19(7): 992-995.
2002, Vol. 19 
