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| SUPERCONDUCTIVITY AT 18-K IN POTASSIUM-DOPED C-60 |
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| Author(s): HEBARD AF, ROSSEINSKY MJ, HADDON RC, MURPHY DW, GLARUM SH, PALSTRA TTM, RAMIREZ AP, KORTAN AR |
| Source: NATURE Volume: 350 Issue: 6319 Pages: 600-601 Published: APR 18 1991 |
| Times Cited: 2,108 References: 6 |
| Abstract: THE synthesis of macroscopic amounts of C60 and C70 (fullerenes) 1 has stimulated a variety of studies on their chemical and physical properties 2,3. We recently demonstrated that C60 and C70 become conductive when doped with alkali metals 4. Here we describe low-temperature studies of potassium-doped C60 both as films and bulk samples, and demonstrate that this material becomes superconducting. Superconductivity is demonstrated by microwave, resistivity and Meissner-effect measurements. Both polycrystalline powders and thin-film samples were studied. A thin film showed a resistance transition with an onset temperature of 16 K and essentially zero resistance near 5 K. Bulk samples showed a well-defined Meissner effect and magnetic-field-dependent microwave absorption beginning at 18 K. The onset of superconductivity at 18 K is the highest yet observed for a molecular superconductor. |
| Document Type: Article |
| Language: English |
| Reprint Address: HEBARD, AF (reprint author), AT&T BELL LABS, MURRAY HILL, NJ 07974 USA |
| Publisher: MACMILLAN MAGAZINES LTD, 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: FH112 |
| ISSN: 0028-0836 |
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