"Superconductivity at 43 K in SmFeAsO(1-x)F(x)," by X.H.
Chen and 5 others, Nature, 453(7196): 761-2, 5 June 2008.
[Authors' affiliation: University of Science and Technology, Hefei, China]
Abstract: "Since the discovery of
high-transition-temperature (high-Tc) superconductivity in layered copper
oxides, extensive effort has been devoted to exploring the origins of this
phenomenon. A Tc higher than 40 K (about the theoretical maximum predicted
from Bardeen-Cooper-Schrieffer theory, however, has been obtained only in
the copper oxide superconductors. The highest reported value for
non-copper-oxide bulk superconductivity is Tc = 39 K in MgB2. The layered
rare-earth metal oxypnictides LnOFeAs (where Ln is La-Nd, Sm and Gd) are
now attracting attention following the discovery of superconductivity at 26
K in the iron-based LaO1-xFxFeAs. Here we report the discovery of bulk
superconductivity in the related compound SmFeAsO1-xFx, which has a
ZrCuSiAs-type
structure. Resistivity and magnetization measurements reveal a transition
temperature as high as 43 K. This provides a new material base for studying
the origin of high-temperature superconductivity."
This 2008 report from Nature was cited 43
times in current journal articles indexed by Clarivate
during September-October 2008. Only one other physics paper published in
the last two years, aside from reviews, received a greater number of
citations during that two-month period. (This emergent, interdisciplinary
topic of iron-based superconductivity has also shown up in recent papers
classified as "chemistry" by the Hot Papers Database.) Prior to the most
recent bimonthly count, citations to the paper have accrued as follows:
July-August 2008: 15 citations
Total citations to date: 58
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