Electronic standing waves on the surface of Bi2Sr 2CaCu2O 8+δ

M. Vershinin, S. Misra, Y. Abe, S. Ono, Y. Ando, A. Yazdani

Research output: Contribution to journalConference articlepeer-review


Scanning tunneling microscopy (STM) measurements have shown that electronic states at the surface of Bi2Sr2CaCu2O 8+δ single crystals form standing wave patterns at temperatures far below the superconducting transition. It has been shown that these patterns are consistent with those expected from the interference of well-defined quasi-particles around the Bi2Sr2CaCu2O 8+δ Fermi surface. We have extended STM measurements of these standing wave patterns to higher temperatures and have found that four unit-cell periodicity patterns observed in the superconducting state persist well above TC, in the pseudogap state. In this regime, many different experimental studies of the cuprates have long claimed the absence of well-defined quasi-particles. If the pseudogap regime is indeed devoid of any coherent quasi-particles then our results suggest that other phenomena, such as stripe formation, must play a role in formation of these patterns.

Original languageEnglish (US)
Pages (from-to)764-767
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number1-4
StatePublished - Aug 2004
Externally publishedYes
EventProceedings of the International Conference on Materials - Rio de Janeiro, Brazil
Duration: May 25 2003May 30 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


  • BiSrCaCuO
  • Quasi-particle scattering
  • STM
  • Stripes


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