Periodic coherence-peak height modulations in superconducting Bi 2Sr2CaCu2O8+δ

A. Fang, C. Howald, N. Kaneko, M. Greven, A. Kapitulnik

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Abstract

In this paper we analyze, using scanning tunneling spectroscopy (STS), the local density of electronic states (LDOS) in nearly optimally doped Bi 2Sr2CaCu2O8+δ in zero magnetic field. We see both dispersive and nondispersive spatial LDOS modulations as a function of energy in our samples. Moreover, a spatial map of the superconducting coherence peak heights shows the same structure as the low-energy LDOS. This suggests that these nondispersive LDOS modulations originate from an underlying charge-density modulation, which interacts with superconductivity.

Original languageEnglish (US)
Article number214514
Pages (from-to)1-8
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number21
DOIs
StatePublished - Dec 2004

Bibliographical note

Funding Information:
We thank Assa Auerbach, Steven Kivelson, and John Tranquada for useful discussions. We also thank H. Eisaki for technical assistance with the crystal growth. The work supported by the U. S. Department of Energy under Contract No. DE-FG03-01ER45929. The crystal growth was supported by the U. S. Department of Energy under Contracts No. DE-FG03-99ER45773 and No. DE-AC03-76SF00515.

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