Evidence for a Quasi-1D Topological-Excitation Liquid in Bi2212 by Tunneling Spectroscopy

Details Evidence for a Quasi-1D Topological-Excitation Liquid in Bi2212 by Tunneling Spectroscopy Evidence for a Quasi-1D Topological-Excitation Liquid in Bi2212 by Tunneling Spectroscopy

2001-06-13

arxiv.org/abs/cond-mat/0106240v1

Europhysics Lett. 55 (2001) 559

Physics

Condensed Matter

Superconductivity

Europysics Lett. (in press)

Scientific paper

10.1209/epl/i2001-00452-6

Tunneling measurements have been carried out on heavily underdoped and slightly overdoped 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 solitonlike excitations.

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