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  Soft x-ray absorption and high-resolution powder x-ray diffraction study of superconducting CaxLa1-xBa1.75-xLa0.25+xCu3Oy system

Agrestini, S., Sanna, S., Zheng, K., De Renzi, R., Pusceddu, E., Concas, G., et al. (2014). Soft x-ray absorption and high-resolution powder x-ray diffraction study of superconducting CaxLa1-xBa1.75-xLa0.25+xCu3Oy system. Journal of Physics and Chemistry of Solids, 75(2), 259-264. doi:10.1016/j.jpcs.2013.09.026.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-C26E-C Version Permalink: http://hdl.handle.net/21.11116/0000-0000-6EA1-F
Genre: Journal Article

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 Creators:
Agrestini, S.1, Author              
Sanna, S.2, Author
Zheng, K.2, Author
De Renzi, R.2, Author
Pusceddu, E.2, Author
Concas, G.2, Author
Saini, N. L.2, Author
Bianconi, A.2, Author
Affiliations:
1Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
2external, ou_persistent22              

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 Abstract: We have studied the electronic structure of unoccupied states measured by 0 K-edge and Cu L-edge x-ray absorption spectroscopy (XAS), combined with crystal structure studied by high resolution powder x-ray diffraction (HRPXRD), of charge-compensated layered superconducting CaxLa1-xBa1.75-xCu3Oy,(0 <= x <= 0.4 and 6.4 <= y <= 7.3) cuprate. A detailed analysis shows that, apart from hole doping, chemical pressure on the electronically active CuO2 plane due to the lattice mismatch with the spacer layers greatly influences the superconducting properties of this system. The results suggest chemical pressure to be the most plausible parameter to control the maximum critical temperatures (T-c(max)) in different cuprate families at optimum hole density. (C) 2013 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2014-02-022014-02-02
 Publication Status: Published in print
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Title: Journal of Physics and Chemistry of Solids
Source Genre: Journal
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Publ. Info: Oxford : Pergamon
Pages: - Volume / Issue: 75 (2) Sequence Number: - Start / End Page: 259 - 264 Identifier: ISSN: 0022-3697
CoNE: /journals/resource/110992357322388