$T_c$ Dependence of Energy Gap and Asymmetry of Coherence Peaks in NdBa$_2$Cu$_3$O$_{7-δ}$

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dc.creatorDas, P.
dc.creatorKoblischka, M. R.
dc.creatorWolf, Th.
dc.creatorAdelmann, P.
dc.creatorHartmann, U.
dc.date2007-11-28
dc.date2008-10-16
dc.date.accessioned2026-07-07T10:16:37Z
dc.date.available2026-07-07T10:16:37Z
dc.descriptionWe report here the results of scanning tunneling spectroscopic experiments performed on hole doped NdBa$_2$Cu$_3$O$_{7-δ}$ single crystals of $T_c$ values of 76 K, 93.5 K and 95.5 K. The energy gaps are observed to be increasing with decreasing $T_c$ values. The coherence peaks are asymmetric with the peaks at the filled states being larger than those at the empty ones. The asymmetry increases with decreasing $T_c$. The observed asymmetry and its $T_c$ dependence can be explained by considering the Mott insulating nature of the material at the undoped state.
dc.description4 pages, 1 Figure, to appear in Euro Phys. Lett
dc.identifierhttps://arxiv.org/abs/0711.4524
dc.identifierhttp://arxiv.org/abs/0711.4524
dc.identifierEuro Phys. Lett. 84, 47004 (2008).
dc.identifierdoi:10.1209/0295-5075/84/47004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/173568
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.title$T_c$ Dependence of Energy Gap and Asymmetry of Coherence Peaks in NdBa$_2$Cu$_3$O$_{7-δ}$
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