"Iron-based layered superconductor La[O1-xFx]FeAs (x = -.05 - 0.12)
with Tc = 26 K," Yoichi Kamihara, Takumi Watanabe, Masahiro
Hirano, and Hideo Hosono, Journal of the American Chemical
Society, 130(11): 3296-7, 19 March 2008.
[Authors' affiliation: Tokyo Institute of Technology, Yokohama, Japan]
From the introduction: "Discovery of the copper-based
superconductor La2-xBaxCuO4 with a high transistion temperature (Tc)
triggered extensive research with the intention of developing new
transition-metal-based superconductors. Currently, high Tc superconductors
are limited to layered perovskites that contain
CuO2 structural units as the conduction layers. However, the Tc of the
non-Cu-based superconductors in this category has remained low, although
spin triplet superconductivity has been found in UPt3 (Tc ~ 0.64 K) and
Sr2-RuO4 (Tc ~ 1.4 K). Here, we report a layered iron-based compound,
LaOFeAs, which undergoes superconducting transition under doping with F-
ions at the O2- site. Its Tc exhibits a trapezoidal shape dependence on F-
content, with the highest Tc of ~26 K at 5-11 atoms %. Further, its
magnetic susceptibility indicates that F-doped LaOFeAs exhibits
Curie-Weiss-like behavior in the normal conducting state."
This 2008 report from the Journal of the American Chemical Society
was cited 20 times in current journal articles
indexed by Clarivate during May-June 2008. Thanks to its latest
two-month total (a particularly impressive number, given that the paper was
published just prior to the May-June count), this is currently the
second-most-cited chemistry paper published in the last two years, aside
from reviews. At the time of the May-June Hot Papers tally, the report's
citations had accrued as follows:
March-April 2008: 1 citation
Total citations to date: 21
SOURCE:
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