The electronic structure of the doped one-dimensional transition metal oxide Y2-xCaxBaNiO5 studied using X-ray absorption

Z Hu; M Knupfer; M Kielwein; UK Rossler; MS Golden; J Fink; FMF de Groot; T Ito; K Oka; G Kaindl

doi:10.1140/epjb/e20020113

The electronic structure of the doped one-dimensional transition metal oxide Y2-xCaxBaNiO5 studied using X-ray absorption

Z Hu^*, M Knupfer, M Kielwein, UK Rossler, MS Golden, J Fink, FMF de Groot, T Ito, K Oka, G Kaindl

^*Corresponding author for this work

Sub Inorganic Chemistry and Catalysis

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

Abstract

A strong anisotropic distribution of the holes in Ni 3d and O 2p orbitals is observed in the polarization dependent O 1s and Ni 2p(3/2) X-ray absorption spectroscopy of the linear-chain nickelate Y2-xCaxBaNiO5 (x = 0, 0 05, 0.1, 0.2), which demonstrates the one-dimensional nature of the electronic state in these compounds. The holes introduced by Ca-doping occupy both O 2p and Ni 3d orbitals along the NiO5 chains. By comparing the experimental Ni 2p(3/2) absorption spectra of Y2-xCaxBaNiO5 to those from charge transfer multiplet calculations we can derive the orbital character of the additional holes to be of similar to60% O2p and similar to40% Ni 3d.

Original language	English
Pages (from-to)	449-453
Number of pages	5
Journal	European physical journal. B, condensed matter physics
Volume	26
Issue number	4
DOIs	https://doi.org/10.1140/epjb/e20020113
Publication status	Published - 2002

Keywords

MAGNETIC-SUSCEPTIBILITY
CORRELATED SYSTEMS
CRYSTAL-STRUCTURE
SPECTRAL-WEIGHT
HALDANE-GAP
SPIN CHAINS
SR0.73CUO2
Y2BANIO5
SPECTROSCOPY
DYNAMICS

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@article{1b94a2baf9a34124a066f792dedb3b29,

title = "The electronic structure of the doped one-dimensional transition metal oxide Y2-xCaxBaNiO5 studied using X-ray absorption",

abstract = "A strong anisotropic distribution of the holes in Ni 3d and O 2p orbitals is observed in the polarization dependent O 1s and Ni 2p(3/2) X-ray absorption spectroscopy of the linear-chain nickelate Y2-xCaxBaNiO5 (x = 0, 0 05, 0.1, 0.2), which demonstrates the one-dimensional nature of the electronic state in these compounds. The holes introduced by Ca-doping occupy both O 2p and Ni 3d orbitals along the NiO5 chains. By comparing the experimental Ni 2p(3/2) absorption spectra of Y2-xCaxBaNiO5 to those from charge transfer multiplet calculations we can derive the orbital character of the additional holes to be of similar to60% O2p and similar to40% Ni 3d.",

keywords = "MAGNETIC-SUSCEPTIBILITY, CORRELATED SYSTEMS, CRYSTAL-STRUCTURE, SPECTRAL-WEIGHT, HALDANE-GAP, SPIN CHAINS, SR0.73CUO2, Y2BANIO5, SPECTROSCOPY, DYNAMICS",

author = "Z Hu and M Knupfer and M Kielwein and UK Rossler and MS Golden and J Fink and {de Groot}, FMF and T Ito and K Oka and G Kaindl",

year = "2002",

doi = "10.1140/epjb/e20020113",

language = "English",

volume = "26",

pages = "449--453",

journal = "European physical journal. B, condensed matter physics",

issn = "1434-6028",

publisher = "Springer",

number = "4",

}

TY - JOUR

T1 - The electronic structure of the doped one-dimensional transition metal oxide Y2-xCaxBaNiO5 studied using X-ray absorption

AU - Hu, Z

AU - Knupfer, M

AU - Kielwein, M

AU - Rossler, UK

AU - Golden, MS

AU - Fink, J

AU - de Groot, FMF

AU - Ito, T

AU - Oka, K

AU - Kaindl, G

PY - 2002

Y1 - 2002

N2 - A strong anisotropic distribution of the holes in Ni 3d and O 2p orbitals is observed in the polarization dependent O 1s and Ni 2p(3/2) X-ray absorption spectroscopy of the linear-chain nickelate Y2-xCaxBaNiO5 (x = 0, 0 05, 0.1, 0.2), which demonstrates the one-dimensional nature of the electronic state in these compounds. The holes introduced by Ca-doping occupy both O 2p and Ni 3d orbitals along the NiO5 chains. By comparing the experimental Ni 2p(3/2) absorption spectra of Y2-xCaxBaNiO5 to those from charge transfer multiplet calculations we can derive the orbital character of the additional holes to be of similar to60% O2p and similar to40% Ni 3d.

AB - A strong anisotropic distribution of the holes in Ni 3d and O 2p orbitals is observed in the polarization dependent O 1s and Ni 2p(3/2) X-ray absorption spectroscopy of the linear-chain nickelate Y2-xCaxBaNiO5 (x = 0, 0 05, 0.1, 0.2), which demonstrates the one-dimensional nature of the electronic state in these compounds. The holes introduced by Ca-doping occupy both O 2p and Ni 3d orbitals along the NiO5 chains. By comparing the experimental Ni 2p(3/2) absorption spectra of Y2-xCaxBaNiO5 to those from charge transfer multiplet calculations we can derive the orbital character of the additional holes to be of similar to60% O2p and similar to40% Ni 3d.

KW - MAGNETIC-SUSCEPTIBILITY

KW - CORRELATED SYSTEMS

KW - CRYSTAL-STRUCTURE

KW - SPECTRAL-WEIGHT

KW - HALDANE-GAP

KW - SPIN CHAINS

KW - SR0.73CUO2

KW - Y2BANIO5

KW - SPECTROSCOPY

KW - DYNAMICS

U2 - 10.1140/epjb/e20020113

DO - 10.1140/epjb/e20020113

M3 - Article

SN - 1434-6028

VL - 26

SP - 449

EP - 453

JO - European physical journal. B, condensed matter physics

JF - European physical journal. B, condensed matter physics

IS - 4

ER -

The electronic structure of the doped one-dimensional transition metal oxide Y2-xCaxBaNiO5 studied using X-ray absorption

Abstract

Keywords

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