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Discrimination between the superconducting gap and the pseudo-gap in Bi2212 from intrinsic tunneling spectroscopy in magnetic field | | V.M.Krasnov
; A.E.Kovalev
; A.Yurgens
; D.Winkler
; | | Date: |
29 Jun 2000 | | Journal: | Phys.Rev.Lett. 86, 2657 (2001) | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | Intrinsic tunneling spectroscopy in high magnetic field ($H$) is used for a direct test of superconducting features in a quasiparticle density of states of high-$T_c$ superconductors. We were able to distinguish with a great clarity two co-existing gaps: (i) the superconducting gap, which closes as $H o H_{c2}(T)$ and $T o T_c(H)$, and (ii) the $c$-axis pseudo-gap, which does not change neither with $H$, nor $T$. Strikingly different magnetic field dependencies, together with previously observed different temperature dependencies of the two gaps ~cite{Krasnov}, speak against the superconducting origin of the pseudo-gap. | | Source: | arXiv, cond-mat/0006479 | | Services: | Forum | Review | PDF | Favorites | |
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