Fermi surface and band dispersion in La2-xSrxCuO4

Akihiro Ino*, Changyoung Kim, Takashi Mizokawa, Zhi Xun Shen, Atsushi Fujimori, Masamitsu Takaba, Kenji Tamasaku, Hiroshi Eisaki, Shinichi Uchida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)


Using angle-resolved photoemission spectroscopy (ARPES), we observe the band structure, the Fermi surface and their doping dependences in La2-xSrxCuO4. The results reveal that the Fermi surface undergoes a dramatic change: it is holelike and centered at (π.π) in underdoped (x = 0.1) and optimally doped (x = 0.15) samples as in other cuprates. while it is electronlike and centered at (0, 0) in heavily overdoped (x = 0.3) ones. The peak in the ARPES spectra near (π/2, π/2) is broad and weak unlike that in other cuprates. In the underdoped and optimally doped samples, a superconducting gap (Δ = 10-15 meV) is observed near (π, 0).

Original languageEnglish
Pages (from-to)1496-1499
Number of pages4
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 1999 May
Externally publishedYes


  • Band dispersion
  • Doping dependence
  • Fermi surface
  • LaSrCuO
  • Superconducting gap

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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