Hole-concentration dependence of band structure in (Bi,Pb) 2(Sr,La)2CuO6+δ determined by the angle-resolved photoemission spectroscopy

T. Kondo, T. Takeuchi, Takayoshi Yokoya, S. Tsuda, S. Shin, U. Mizutani

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Energy-momentum (E-k) dispersion and the shape of the Fermi surface (FS) in the (Bi,Pb)2(Sr,La)2CuO6+δ (Bi2201) superconductors of various hole-concentrations were investigated by the angle-resolved photoemission spectroscopy (ARPES) with high energy and momentum resolutions (ΔE = 10 meV and Δk = 0.005 Å-1). The E-k dispersion is kept rigid and the chemical potential moves towards lower or higher energies with increasing or decreasing hole-concentration, respectively, over a wide hole-concentration range from the nearly optimal-doped condition with a transition temperature of 32K to a heavily over-doped condition where the superconducting transition disappears. By comparing the shape of the FS determined for the present Bi2201 with that reported for the Bi 2Sr2CaCu2O8+δ (Bi2212), we found that the area surrounded by the FS in the Bi2201 is fairly larger than that in the Bi2212. Estimated hole-concentration in the Bi2201 was found to vary from 0.25 to 0.43 holes/Cu, that is more than twice as large as that in the optimally doped La2-xSrxCuO4 (LSCO) and Bi2212 superconductors of 0.17 holes/Cu.

Original languageEnglish
Pages (from-to)663-668
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume137-140
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

Fingerprint

Hole concentration
Photoelectron spectroscopy
Band structure
Fermi surface
photoelectric emission
spectroscopy
Superconducting materials
Fermi surfaces
Momentum
Chemical potential
Superconducting transition temperature
kinetic energy
transition temperature
momentum
energy

Keywords

  • ARPES
  • Band structure
  • Bi2201
  • High-T
  • Hole-concentration

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Hole-concentration dependence of band structure in (Bi,Pb) 2(Sr,La)2CuO6+δ determined by the angle-resolved photoemission spectroscopy. / Kondo, T.; Takeuchi, T.; Yokoya, Takayoshi; Tsuda, S.; Shin, S.; Mizutani, U.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 137-140, No. SPEC. ISS., 07.2004, p. 663-668.

Research output: Contribution to journalArticle

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AU - Tsuda, S.

AU - Shin, S.

AU - Mizutani, U.

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AB - Energy-momentum (E-k) dispersion and the shape of the Fermi surface (FS) in the (Bi,Pb)2(Sr,La)2CuO6+δ (Bi2201) superconductors of various hole-concentrations were investigated by the angle-resolved photoemission spectroscopy (ARPES) with high energy and momentum resolutions (ΔE = 10 meV and Δk = 0.005 Å-1). The E-k dispersion is kept rigid and the chemical potential moves towards lower or higher energies with increasing or decreasing hole-concentration, respectively, over a wide hole-concentration range from the nearly optimal-doped condition with a transition temperature of 32K to a heavily over-doped condition where the superconducting transition disappears. By comparing the shape of the FS determined for the present Bi2201 with that reported for the Bi 2Sr2CaCu2O8+δ (Bi2212), we found that the area surrounded by the FS in the Bi2201 is fairly larger than that in the Bi2212. Estimated hole-concentration in the Bi2201 was found to vary from 0.25 to 0.43 holes/Cu, that is more than twice as large as that in the optimally doped La2-xSrxCuO4 (LSCO) and Bi2212 superconductors of 0.17 holes/Cu.

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