Angle-resolved photoemission study of superconducting ladder compound Sr14-xCaxCu24O41

T. Sato, Takayoshi Yokoya, T. Takahashi, M. Uehara, T. Nagata, J. Goto, Jun Akimitsu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Angle-resolved photoemission spectroscopy has been performed on Sr14-xCaxCu24O41 (x = 0-11.5) which consists of two-leg Cu2O3 ladders and edge-sharing CuO2 chains. A dispersive band with the periodicity of ladder sublattice is observed near the Fermi level (EF) for x=0. The band shows a minimum binding energy at ka= (2n + 1)π/2, suggesting that a Mott-Hubbard gap opens on the ladder. This indicates that copper atoms on the ladder take essentially the divalent state (Cu2+) and a majority of self-doped holes reside on the chain. We found that the Ca substitution causes a transfer of holes from the chain to the ladder.

Original languageEnglish
Pages (from-to)1912-1916
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume59
Issue number10-12
Publication statusPublished - Oct 1998
Externally publishedYes

Fingerprint

Ladders
Photoemission
ladders
photoelectric emission
Photoelectron spectroscopy
Fermi level
Binding energy
sublattices
Copper
periodic variations
Substitution reactions
binding energy
substitutes
copper
Atoms
causes
spectroscopy
atoms

Keywords

  • Angle-resolved photoemission
  • Band structure
  • Ladder compound
  • Mott-Hubbard gap
  • SrCaCuO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Angle-resolved photoemission study of superconducting ladder compound Sr14-xCaxCu24O41 . / Sato, T.; Yokoya, Takayoshi; Takahashi, T.; Uehara, M.; Nagata, T.; Goto, J.; Akimitsu, Jun.

In: Journal of Physics and Chemistry of Solids, Vol. 59, No. 10-12, 10.1998, p. 1912-1916.

Research output: Contribution to journalArticle

Sato, T. ; Yokoya, Takayoshi ; Takahashi, T. ; Uehara, M. ; Nagata, T. ; Goto, J. ; Akimitsu, Jun. / Angle-resolved photoemission study of superconducting ladder compound Sr14-xCaxCu24O41 . In: Journal of Physics and Chemistry of Solids. 1998 ; Vol. 59, No. 10-12. pp. 1912-1916.
@article{e29005f2fc3d4141bb9fe2ae43b559e5,
title = "Angle-resolved photoemission study of superconducting ladder compound Sr14-xCaxCu24O41",
abstract = "Angle-resolved photoemission spectroscopy has been performed on Sr14-xCaxCu24O41 (x = 0-11.5) which consists of two-leg Cu2O3 ladders and edge-sharing CuO2 chains. A dispersive band with the periodicity of ladder sublattice is observed near the Fermi level (EF) for x=0. The band shows a minimum binding energy at ka= (2n + 1)π/2, suggesting that a Mott-Hubbard gap opens on the ladder. This indicates that copper atoms on the ladder take essentially the divalent state (Cu2+) and a majority of self-doped holes reside on the chain. We found that the Ca substitution causes a transfer of holes from the chain to the ladder.",
keywords = "Angle-resolved photoemission, Band structure, Ladder compound, Mott-Hubbard gap, SrCaCuO",
author = "T. Sato and Takayoshi Yokoya and T. Takahashi and M. Uehara and T. Nagata and J. Goto and Jun Akimitsu",
year = "1998",
month = "10",
language = "English",
volume = "59",
pages = "1912--1916",
journal = "Journal of Physics and Chemistry of Solids",
issn = "0022-3697",
publisher = "Elsevier Limited",
number = "10-12",

}

TY - JOUR

T1 - Angle-resolved photoemission study of superconducting ladder compound Sr14-xCaxCu24O41

AU - Sato, T.

AU - Yokoya, Takayoshi

AU - Takahashi, T.

AU - Uehara, M.

AU - Nagata, T.

AU - Goto, J.

AU - Akimitsu, Jun

PY - 1998/10

Y1 - 1998/10

N2 - Angle-resolved photoemission spectroscopy has been performed on Sr14-xCaxCu24O41 (x = 0-11.5) which consists of two-leg Cu2O3 ladders and edge-sharing CuO2 chains. A dispersive band with the periodicity of ladder sublattice is observed near the Fermi level (EF) for x=0. The band shows a minimum binding energy at ka= (2n + 1)π/2, suggesting that a Mott-Hubbard gap opens on the ladder. This indicates that copper atoms on the ladder take essentially the divalent state (Cu2+) and a majority of self-doped holes reside on the chain. We found that the Ca substitution causes a transfer of holes from the chain to the ladder.

AB - Angle-resolved photoemission spectroscopy has been performed on Sr14-xCaxCu24O41 (x = 0-11.5) which consists of two-leg Cu2O3 ladders and edge-sharing CuO2 chains. A dispersive band with the periodicity of ladder sublattice is observed near the Fermi level (EF) for x=0. The band shows a minimum binding energy at ka= (2n + 1)π/2, suggesting that a Mott-Hubbard gap opens on the ladder. This indicates that copper atoms on the ladder take essentially the divalent state (Cu2+) and a majority of self-doped holes reside on the chain. We found that the Ca substitution causes a transfer of holes from the chain to the ladder.

KW - Angle-resolved photoemission

KW - Band structure

KW - Ladder compound

KW - Mott-Hubbard gap

KW - SrCaCuO

UR - http://www.scopus.com/inward/record.url?scp=0032179901&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032179901&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032179901

VL - 59

SP - 1912

EP - 1916

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 10-12

ER -