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Increased transition temperature in superconducting sodium(2)-cesium-C60 by intercalation of ammonia.

Author(s) : ZHOU O., FLEMING R. M., MURPHY D. W., ROSSEINSKY M. J., RAMIREZ A. P., DOVER R. B. van, HADDON R. C.

Type of article: Article

Summary

The alkali-metal fullerides of A3C60 type have an unusually high transition temperature, which increases with the size of the face-centered cubic unit cell. The increase in critical temperature is attributed to a decrease in the conduction band width and one ultimately expects a saturation of the effect. This regime is explored by expanding the A3C60 structure through intercalation of neutral molecules capable of solvating the A+ ions. The reaction of ammonia with sodium(2)-cesium-C60 produces a compound which has an expanded unit cell and an increased critical temperature (29.6 K). J.V.

Details

  • Original title: Increased transition temperature in superconducting sodium(2)-cesium-C60 by intercalation of ammonia.
  • Record ID : 1994-1409
  • Languages: English
  • Source: Nature - vol. 362 - n. 6419
  • Publication date: 1993/04/01
  • Document available for consultation in the library of the IIR headquarters only.

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