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Evidence for a quasi-1D topological-excitation liquid in Bi2Sr2CaCu2O8+x from tunneling spectoscopy

par Mourachkine, Andrei
Référence Europhysics letters, 55, 4, page (559-565)
Publication Publié, 2001-08

Article révisé par les pairs

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Résumé :

Tunneling measurements have been carried out on heavily underdoped and slightly overdoped Bi2Sr2CaCu2O8+x (Bi2212) single crystals by using a break-junction technique. We find that in-plane tunneling spectra below Tc are the combination of incoherent part from the pseudogap and coherent quasiparticle peaks. There is a correlation between the magnitude of the pseudogap and the magnitude of the superconducting gap in Bi2212. We find that the quasiparticle conductance peaks are caused by condensed soliton-like excitations.