TY - JOUR
T1 - Band filling and width control in fullerides
AU - Iwasa, Y.
AU - Taga, S.
AU - Takenobu, T.
AU - Shimoda, H.
AU - Mitani, T.
AU - Prassides, K.
AU - Brown, C. M.
N1 - Funding Information:
Authors appreciate K. Ishii, H. Suematsu, and Y. Murakami for their help in characterization of samples using synchrotron radiation. T’his work has been supported by Grant from the Japan Society for Promotion of Science (RFTF96POO104, MPCR-363196-03262). YI thanks Inoue Science Foundation for their support.
PY - 1999/6/24
Y1 - 1999/6/24
N2 - Highly doped states of fullerene C60 solids have been investigated. A single phase of binary Ba4C60 was first synthesized and confirmed to be a noncubic ambient pressure superconductor. By cointercalation of alkali metals and Ba, an isostructural series of alkali-Ba-C60 ternaries have been synthesized. This new class of compounds allows us to vary the band-filling and band-filling with keeping the body-centered-cubic (bcc) structure unchanged. Systematic synthesis study of these Ba-including fullerides uncovered various aspects of the highly doped fullerides. Of particular interest is that the criteria for the occurrence of superconductivity are considerably different between the low and high reduction states. Superconductivity at the low reduction state is strictly limited at the half-filling of the t1u band and the fcc-related structures, while that at the high reduction state appears at several valence states irrespective of crystal structures.
AB - Highly doped states of fullerene C60 solids have been investigated. A single phase of binary Ba4C60 was first synthesized and confirmed to be a noncubic ambient pressure superconductor. By cointercalation of alkali metals and Ba, an isostructural series of alkali-Ba-C60 ternaries have been synthesized. This new class of compounds allows us to vary the band-filling and band-filling with keeping the body-centered-cubic (bcc) structure unchanged. Systematic synthesis study of these Ba-including fullerides uncovered various aspects of the highly doped fullerides. Of particular interest is that the criteria for the occurrence of superconductivity are considerably different between the low and high reduction states. Superconductivity at the low reduction state is strictly limited at the half-filling of the t1u band and the fcc-related structures, while that at the high reduction state appears at several valence states irrespective of crystal structures.
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U2 - 10.1016/S0379-6779(98)00360-9
DO - 10.1016/S0379-6779(98)00360-9
M3 - Conference article
AN - SCOPUS:0033138039
SN - 0379-6779
VL - 103
SP - 2462
EP - 2465
JO - Synthetic Metals
JF - Synthetic Metals
IS - 1-3
T2 - Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98)
Y2 - 12 July 1998 through 18 July 1998
ER -