STM studies on structural modulation and two-phase microstructures in Pb-doped Bi2201 single crystals

Terukazu Nishizaki, Kazutaka Kudo, Naoyuki Okumura, Norio Kobayashi

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6 Citations (Scopus)

Abstract

We have performed scanning tunneling microscopy studies on the structural modulation of Bi2.12 - xPbxSr1.88CuOy (Pbx-Bi2201, x = 0.18, 0.27, 0.32, 0.37) single crystals. The observed STM images show the clear atomic arrangement with the four-fold symmetry on the Bi(Pb)-O layer. The wavelength λ of incommensurate structural modulations along the b-axis increases with Pb content (i.e., λ ∼ 43 Å for x = 0.18) and the modulations completely disappear for x ∼ 0.37. In the intermediate content (x ∼ 0.27, 0.32), we find two-phase microstructures which consist of the modulated region with λ ∼ 46 Å and the modulation-free region.

Original languageEnglish
Pages (from-to)156-157
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Sep 1 2007
Externally publishedYes

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Keywords

  • Pb-doped Bi2201
  • Phase separation
  • Scanning tunneling microscopy
  • Structural modulation

ASJC Scopus subject areas

  • Condensed Matter Physics

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