In:
Science, American Association for the Advancement of Science (AAAS), Vol. 258, No. 5088 ( 1992-12-04), p. 1636-1638
Abstract:
The temperature- and concentration-dependent resistivities of annealed Ca x C 60 and Sr x C 60 films were measured near room temperature. Resistivity minima were observed at x = 2 and 5. The resistivities of these films were ρ min ∼1 ohm-centimeter for x = 2 and ρ min ∼10 –2 ohm-centimeter for x = 5. This latter value is comparable to the resistivities found in similar experiments on K 3 C 60 films. There is a maximum in the resistivity between x = 2 and 3, and another at x ∼7. The conductivity is activated over the whole range of compositions, and the activation energy scales with the logarithm of the resistivity. The results suggest that the conductivity and superconductivity observed in Ca 5 C 60 are associated with the population of bands derived from the t 1g level of C 6O .
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.258.5088.1636
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
1992
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
SSG:
11
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