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Superconductivity in Intercalated and Substituted Y 2 Br 2 C 2
Author(s) -
Bäcker Michael,
Simon Arndt,
Kremer Reinhard K.,
Mattausch HansJürgen,
Dronskowski Richard,
Rouxel Jean
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199607521
Subject(s) - superconductivity , valence (chemistry) , electron , intercalation (chemistry) , fermi level , condensed matter physics , chemistry , crystallography , transition temperature , materials science , physics , inorganic chemistry , nuclear physics , organic chemistry
Layer compounds of the type Y 2 X 2 C 2 (X = Cl, Br, I) show superconductivity at temperatures between 2.3 and 11.2 K. The transition temperature is related to the tendency of conduction electrons toward pairwise localization in C 2 * states at the Fermi level, and changes with the concentration of valence electrons, which is varied by intercalation of Na.