"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 transition 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 124 times in current journal articles indexed by
Clarivate during May-June 2009. This latest two-month tally extends
the paper's run as the most-cited chemistry report published in the last
two years (aside from reviews) to six consecutive bimonthly periods. Prior
to the most recent count, citations to the paper have accrued as follows:
SOURCE:
Hot Papers Database (Included with a subscription to the print
newsletter
Science Watch®, available from the
Research Services
Group of
Thomson
Reuters. Packaged on a CD that is mailed
with each Science Watch issue, the Hot Papers
Database contains data on hundreds of highly cited papers published during
the last two years. User interface permits searching by author,
organization, journal, field, and more. Total citations, as well as
citations accrued during successive bimonthly periods, can be assessed and
graphed. An updated CD containing the most recent bimonthly data is mailed
with every new issue of Science Watch, six times a
year. The CD also includes an electronic version of the Science
Watch issue in HTML format, for personal desktop
access.