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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 670766.0, MPI für Chemische Physik fester Stoffe / publications 2013
Determination of hole distribution in Sr14-xCaxCu24O41 using soft x-ray absorption spectroscopy at the Cu L3 edge
Authors:Huang, M.-J.; Deng, G.; Chin, Y. Y.; Hu, Z.; Cheng, J.-G.; Chou, F. C.; Conder, K.; Zhou, J.-S.; Pi, T.-W.; Goodenough, J. B.; Lin, H.-J.; Chen, C. T.
Date of Publication (YYYY-MM-DD):2013-07-22
Title of Journal:Physical Review B
Volume:88
Issue / Number:1
Start Page:014520-1
End Page:014520-6
Sequence Number of Article:014520
Review Status:not specified
Audience:Not Specified
Abstract / Description:The physical properties of Sr14-xCaxCu24O41 are determined by the hole distribution between the edge-shared CuO2 chain and the corner-shared Cu2O3 two-leg ladder, but inconsistent results on the hole distribution were obtained in various experimental works in recent decades. In this work we reinvestigate the hole distribution by soft x-ray absorption spectroscopy at the Cu L-3 edge. By comparing with the pure ladder and the pure chain systems, we can unambiguously distinguish between the hole distributions in the chain and the ladder. We have found that there are 5.3 holes in the edge-shared chain and 0.7 holes in the corner-shared ladder on average for Sr14Cu24O41. Upon Ca substitution, the holes gradually transfer from the edge-shared chain to the corner-shared ladder, and there are up to 1.21 holes in the corner-shared ladder for Sr1.8Ca12.2Cu24O41.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000322112400008 [ID No:1]
ISSN:1098-0121 [ID No:2]
DOI:10.1103/PhysRevB.88.014520
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