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Originally published in Science Express on 17 October 2002
Science 8 November 2002:
Vol. 298. no. 5596, pp. 1213 - 1215
DOI: 10.1126/science.1078535
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Reports

Superconductivity in Dense Lithium

Viktor V. Struzhkin,1* Mikhail I. Eremets,2 Wei Gan,13 Ho-kwang Mao,1 Russell J. Hemley1

Superconductivity in compressed lithium is observed by magnetic susceptibility and electrical resistivity measurements. A superconducting critical temperature (Tc) is found ranging from 9 to 16 kelvin at 23 to 80 gigapascals. The pressure dependence of Tc suggests multiple phase transitions, consistent with theoretical predictions and reported x-ray diffraction results. The observed values for Tc are much lower than those theoretically predicted, indicating that more sophisticated theoretical treatments similar to those proposed for metallic hydrogen may be required to understand superconductivity in dense phases of lithium.

1 Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, N.W., Washington, DC 20015, USA.
2 Max Planck Institut für Chemie, Postfach 3060, 55020 Mainz, Germany.
3 Thomas S. Wootton High School, Rockville, MD 20850, USA.
*   To whom correspondence should be addressed. E-mail: struzhkin{at}gl.ciw.edu

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