Low-energy electronic state of the structural modulation-free Bi2 Sr2 CuO6 + δ studied by the scanning tunneling microscopy

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report scanning tunneling microscopy (STM) studies on the structural modulation-free Bi2 Sr2 CuO6 + δ in which Bi atoms are partially substituted by Pb atoms. Optimally doped sample with the superconducting transition temperature Tc = 22 K shows short atom-strings at a bias-voltage of 5 mV. Some strings are bundled and aligned along the orthogonal oriented two Cu-O-Cu directions randomly. Atom-strings are also observed in the overdoped sample (Tc = 7 K), while they are hardly seen in the heavily overdoped sample (Tc = 4.5 K). It is found that the disturbance from overdoped holes reduces the number of atom-strings and obscures every atom-string. These results indicate that the CuO2 plane possesses not only the two-dimensional electronic correlation caused by the two-dimensionality but also short-range one-dimensional one.

Original languageEnglish
Pages (from-to)3022-3026
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

Fingerprint

Electronic states
Scanning tunneling microscopy
scanning tunneling microscopy
Modulation
strings
modulation
Atoms
electronics
atoms
energy
Bias voltage
Superconducting transition temperature
disturbances
transition temperature
electric potential

Keywords

  • A. Superconductors
  • C. Scanning tunneling microscopy
  • D. Charge-density waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)

Cite this

Low-energy electronic state of the structural modulation-free Bi2 Sr2 CuO6 + δ studied by the scanning tunneling microscopy. / Kudo, Kazutaka; Nishizaki, T.; Okumura, N.; Kobayashi, N.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 12, 12.2008, p. 3022-3026.

Research output: Contribution to journalArticle

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