Overdoped cuprates with high-temperature superconducting transitions
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Journal Title
Journal ISSN
Volume Title
School of Chemical Technology |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2013
Department
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Mcode
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Language
en
Pages
021103/1-7
Series
APL Materials, Volume 1, Issue 2
Abstract
Evidence for high-Tc cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both x-ray absorption near-edge spectroscopy and bond valence sum measurements are >2.3, and are in close agreement with each other for structures in the homologous series (Cu 0.75 Mo 0.25)Sr2(Y,Ce)sCu2O5+2s+δ with s = 1, 2, 3, and 4. The record short apical oxygen distance, at odds with current theory, suggests the possibility of a new pairing mechanism. The possibility that the charge reservoir layers are able to screen long range coulomb interactions and thus enhance Tc is discussed.Description
Keywords
superconductivity, copper, molybdenum
Other note
Citation
Marezio, M. & Chmaissem, O. & Bougerol, C. & Karppinen, Maarit & Yamauchi, H. & Geballe, T. H. 2013. Overdoped cuprates with high-temperature superconducting transitions. APL Materials. Volume 1, Issue 2. 021103/1-7. ISSN 2166-532X (printed). DOI: 10.1063/1.4817895.
