STM studies on the hole doping dependence of the hidden order in Pb-doped Bi2201

Kazutaka Kudo, T. Nishizaki, N. Okumura, N. Kobayashi

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We have performed STM measurements of the modulation-free Pb-doped Bi2201. In the overdoped (Tc = 7 K) and the optimally doped (Tc = 22 K) samples, the distorted patch arrangement has been observed in low-bias STM images below 50 mV. With decreasing doping level, the size of patches becomes smaller and their arrangement more orderly. In the optimally doped sample, furthermore, the bright atomic-strings have been detected at low bias-voltages below 10 mV. The distorted patch arrangement may be regarded as the two-dimensional superstructure incompletely formed due to the absence of the structural modulation and/or the disturbance from doped holes. The atomic-string indicates the one-dimensional electronic correlation and may be the new type hidden order.

Original languageEnglish
Pages (from-to)40-43
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Issue numberSUPPL.
Publication statusPublished - Oct 1 2007
Externally publishedYes



  • Bi-based cuprates
  • Hidden order
  • Modulation-free
  • Pb-doped Bi2201
  • Scanning tunneling microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

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