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On the Origin of the Tunneling Asymmetry in the Cuprate Superconductors | | Tao Li
; Fan Yang
; Yong-Jin Jiang
; | | Date: |
4 Jun 2004 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Abstract: | We argue the coherent part of the spectral weight always contribute symmetrically to the STM spectrum at sufficiently low energy and the tunneling asymmetry is a manifestation of the incoherent part of the electron spectrum. By subtracting the particle side spectrum from the hole side spectrum in the published STM data of Pan extit{et al} on $BSCCO_{2212}(T_{c}=84K)$, we find the difference spectrum show a well defined gap structure at 25 meV. We argue this gap may represent a new energy scale of the system, namely the energy scale for spin-charge recombination in this system. | | Source: | arXiv, cond-mat/0406095 | | Services: | Forum | Review | PDF | Favorites | |
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