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Anomalous Fermi-surface dependent pairing in a self-doped high-Tc superconductor.

Abstract:

We report the discovery of a self-doped multilayer high Tc superconductor Ba2Ca3Cu4O8F2 (F0234) which contains distinctly different superconducting gap magnitudes along its two Fermi-surface sheets. While formal valence counting would imply this material to be an undoped insulator, it is a self-doped superconductor with a Tc of 60 K, possessing simultaneously both electron- and hole-doped Fermi-surface sheets. Intriguingly, the Fermi-surface sheet characterized by the much larger gap is the e...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
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Journal:
Physical review letters
Volume:
97
Issue:
23
Pages:
236401
Publication date:
2006-12-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:c79362f9-e4da-47a1-b375-4eac66bd3cbf
Source identifiers:
213540
Local pid:
pubs:213540
Language:
English

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