Auger spectra and band structure of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4

R. Bar-Deroma; J. Felsteiner; R. Brener; J. Ashkenazi; D. Van Der Marel

doi:10.1103/PhysRevB.45.2361

Auger spectra and band structure of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4

R. Bar-Deroma, J. Felsteiner, R. Brener, J. Ashkenazi, D. Van Der Marel

Research output: Contribution to journal › Article › peer-review

Abstract

High-resolution Auger electron spectra of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4 have been measured. The experimental Auger line shapes of the oxygen KLL and copper L2,3VV transitions are compared with those generated from local-density-approximation linear-muffin-tin-orbital band-structure calculations. An analysis based on this comparison is used to determine the Coulomb parameters Up and Ud of the oxygen and copper atoms, respectively. For this purpose, an extended version of Cini and Sawatzkys expression for the theoretical Auger line shape is used, taking into account the multiplet structure of the Auger final states and the point symmetry of the oxygen sites. We find Up of approximately 5 and 7 eV for the planar and apical oxygen sites, respectively, and Ud of 78 eV for copper. An estimate of the effect of electron correlations on the band structure suggests a decrease of the anisotropy found in Up.

Original language	English
Pages (from-to)	2361-2370
Number of pages	10
Journal	Physical Review B
Volume	45
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.45.2361
State	Published - 1992
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

Access to Document

10.1103/PhysRevB.45.2361

Cite this

@article{ee9de6ed88674cc2aa985959634278b6,

title = "Auger spectra and band structure of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4",

abstract = "High-resolution Auger electron spectra of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4 have been measured. The experimental Auger line shapes of the oxygen KLL and copper L2,3VV transitions are compared with those generated from local-density-approximation linear-muffin-tin-orbital band-structure calculations. An analysis based on this comparison is used to determine the Coulomb parameters Up and Ud of the oxygen and copper atoms, respectively. For this purpose, an extended version of Cini and Sawatzkys expression for the theoretical Auger line shape is used, taking into account the multiplet structure of the Auger final states and the point symmetry of the oxygen sites. We find Up of approximately 5 and 7 eV for the planar and apical oxygen sites, respectively, and Ud of 78 eV for copper. An estimate of the effect of electron correlations on the band structure suggests a decrease of the anisotropy found in Up.",

author = "R. Bar-Deroma and J. Felsteiner and R. Brener and J. Ashkenazi and {Van Der Marel}, D.",

year = "1992",

doi = "10.1103/PhysRevB.45.2361",

language = "English",

volume = "45",

pages = "2361--2370",

journal = "Physical Review B",

issn = "0163-1829",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Auger spectra and band structure of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4

AU - Bar-Deroma, R.

AU - Felsteiner, J.

AU - Brener, R.

AU - Ashkenazi, J.

AU - Van Der Marel, D.

PY - 1992

Y1 - 1992

N2 - High-resolution Auger electron spectra of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4 have been measured. The experimental Auger line shapes of the oxygen KLL and copper L2,3VV transitions are compared with those generated from local-density-approximation linear-muffin-tin-orbital band-structure calculations. An analysis based on this comparison is used to determine the Coulomb parameters Up and Ud of the oxygen and copper atoms, respectively. For this purpose, an extended version of Cini and Sawatzkys expression for the theoretical Auger line shape is used, taking into account the multiplet structure of the Auger final states and the point symmetry of the oxygen sites. We find Up of approximately 5 and 7 eV for the planar and apical oxygen sites, respectively, and Ud of 78 eV for copper. An estimate of the effect of electron correlations on the band structure suggests a decrease of the anisotropy found in Up.

AB - High-resolution Auger electron spectra of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4 have been measured. The experimental Auger line shapes of the oxygen KLL and copper L2,3VV transitions are compared with those generated from local-density-approximation linear-muffin-tin-orbital band-structure calculations. An analysis based on this comparison is used to determine the Coulomb parameters Up and Ud of the oxygen and copper atoms, respectively. For this purpose, an extended version of Cini and Sawatzkys expression for the theoretical Auger line shape is used, taking into account the multiplet structure of the Auger final states and the point symmetry of the oxygen sites. We find Up of approximately 5 and 7 eV for the planar and apical oxygen sites, respectively, and Ud of 78 eV for copper. An estimate of the effect of electron correlations on the band structure suggests a decrease of the anisotropy found in Up.

UR - http://www.scopus.com/inward/record.url?scp=4043124588&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.45.2361

DO - 10.1103/PhysRevB.45.2361

M3 - Article

AN - SCOPUS:4043124588

SN - 0163-1829

VL - 45

SP - 2361

EP - 2370

JO - Physical Review B

JF - Physical Review B

IS - 5

ER -

Auger spectra and band structure of La1.85Sr0.15CuO4 and La1.85Ba0.15CuO4

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this