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The effects of spin fluctuations on the tunneling spectroscopy in High-T_c Superconductors

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arxiv cond-mat/0012168 v1 pith:TOBCWNH6 submitted 2000-12-11 cond-mat.supr-con cond-mat.str-el

C.L.Wu , Chung-Yu Mou , Darwin Chang This is my paper
classification cond-mat.supr-concond-mat.str-el
keywords datafluctuationshumpstructuretunnelingeffectshighjunction
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We investigate the effects of spin fluctuations on the tunneling spectra of the NS junction. In the high junction resistance limit, the dip/hump structure observed in ARPES data for the high Tc superconductors is reproduced in a RPA treatment of the t-t'-J model. It is shown that the dip/hump structure weakens as doping increases as reflected in the data. In the other limit, we predict that the zero bias Andreev peak can coexist with the dip/hump structure. Furthermore, the c-axis tunneling spectra is found to be very similar to a recent STM data once these fluctuations are included.

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