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Evidence for a quasi-one-dimensional topological-excitation liquid in Bi2Sr2CaCu2O8+x from tunneling spectroscopy

par Mourachkine, Andrei
Référence Physica. C, Superconductivity, 364-365, page (269-273)
Publication Publié, 2001-11

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 (PG) and coherent quasi-particle (QP) peaks. There is a correlation between the magnitude of the PG and the magnitude of the superconducting gap in Bi2212. Analysis of the data suggests that the tunneling PG in Bi2212 is predominantly a charge-density-wave gap on dynamical charge stripes. We find that the QP peaks appear from the condensation of soliton-like excitations. Thus, we present evidence for a quasi-one-dimensional topological-excitation liquid in Bi2212. © 2001 Elsevier Science B.V. All rights reserved.