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Recovery and Enhancement of Superconductivity in the Sodium−Hydrogen−C60 Ternary System
- Source :
- The Journal of Physical Chemistry B. 101:10136-10140
- Publication Year :
- 1997
- Publisher :
- American Chemical Society (ACS), 1997.
-
Abstract
- Sodium−hydrogen−C60 ternary compounds have been prepared by intercalation of sodium hydride (NaH) into C60. This method afforded a high-quality superconducting (SC) sample with a large volume fraction, but on the other hand, only a few high-quality SC samples were obtained and most of the samples were nonsuperconducting. However, we have succeeded in transforming a non-SC sample into an SC sample and in enhancing superconductivity. The Rietveld analysis clarifies that the non-SC phase (α-phase) has an orthorhombic structure, in contrast to a cubic structure for the SC phase (β-phase). The absence of superconductivity in the α-phase will be understood by the broken symmetry.
- Subjects :
- Superconductivity
Materials science
Ternary numeral system
Rietveld refinement
Intercalation (chemistry)
Surfaces, Coatings and Films
Sodium hydride
chemistry.chemical_compound
Crystallography
chemistry
Phase (matter)
Materials Chemistry
Orthorhombic crystal system
Physical and Theoretical Chemistry
Ternary operation
Subjects
Details
- ISSN :
- 15205207 and 15206106
- Volume :
- 101
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry B
- Accession number :
- edsair.doi...........c0b48cb5c480a073f0f9f6f31b1b3fb3