Superconductivity at 28 K in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Rb</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Matthew J. Rosseinsky(Nokia (United States)), A. P. Ramirez(Nokia (United States)), S. H. Glarum(AT&T (United States)), D. W. Murphy(Nokia (United States)), Robert C. Haddon(AT&T (United States)), A. F. Hebard(Nokia (United States)), Thomas Palstra(AT&T (United States)), A. R. Kortan(AT&T (United States)), S. M. Zahurak(Nokia (United States)), A. V. Makhija(Nokia (United States))
Cited by 887Open Access
Abstract
Meissner-effect and microwave-absorption measurements on bulk samples show that ${\mathrm{Rb}}_{\mathit{x}}$${\mathrm{C}}_{60}$ is superconducting with a maximum transition temperature of 28 K. This is a 10-K (60%) increase over the K-doped material. Only ${\mathrm{Ba}}_{0.6}$${\mathrm{K}}_{0.4}$${\mathrm{BiO}}_{3}$ and the cuprate superconductors have higher transition temperatures.
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