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

doi:10.1143/JPSJ.68.1496

Fermi surface and band dispersion in La_2-xSr_xCuO₄

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 journal › Article › peer-review

128 Citations (Scopus)

Abstract

Using angle-resolved photoemission spectroscopy (ARPES), we observe the band structure, the Fermi surface and their doping dependences in La_2-xSr_xCuO₄. 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 language	English
Pages (from-to)	1496-1499
Number of pages	4
Journal	journal of the physical society of japan
Volume	68
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.68.1496
Publication status	Published - 1999 May
Externally published	Yes

Keywords

ARPES
Band dispersion
Doping dependence
Fermi surface
LaSrCuO
Superconducting gap

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.68.1496

Cite this

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title = "Fermi surface and band dispersion in La2-xSrxCuO4",

abstract = "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).",

keywords = "ARPES, Band dispersion, Doping dependence, Fermi surface, LaSrCuO, Superconducting gap",

author = "Akihiro Ino and Changyoung Kim and Takashi Mizokawa and Shen, {Zhi Xun} and Atsushi Fujimori and Masamitsu Takaba and Kenji Tamasaku and Hiroshi Eisaki and Shinichi Uchida",

year = "1999",

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doi = "10.1143/JPSJ.68.1496",

language = "English",

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TY - JOUR

T1 - Fermi surface and band dispersion in La2-xSrxCuO4

AU - Ino, Akihiro

AU - Kim, Changyoung

AU - Mizokawa, Takashi

AU - Shen, Zhi Xun

AU - Fujimori, Atsushi

AU - Takaba, Masamitsu

AU - Tamasaku, Kenji

AU - Eisaki, Hiroshi

AU - Uchida, Shinichi

PY - 1999/5

Y1 - 1999/5

N2 - 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).

AB - 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).

KW - ARPES

KW - Band dispersion

KW - Doping dependence

KW - Fermi surface

KW - LaSrCuO

KW - Superconducting gap

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