Intercalant ordering in the stage-1 indium chloride graphite intercalation compound
| Autor: | W. R. Datars, P K Ummat, D. Marchesan, J D Palidwar |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Free electron model
Phase transition Condensed matter physics Chemistry Fermi surface Atmospheric temperature range Condensed Matter Physics De Haas–van Alphen effect Graphite intercalation compound chemistry.chemical_compound Electrical resistivity and conductivity Condensed Matter::Superconductivity Differential thermal analysis Condensed Matter::Strongly Correlated Electrons General Materials Science |
| Zdroj: | Journal of Physics: Condensed Matter. 8:991-997 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/8/8/010 |
| Popis: | The stage-1 graphite intercalation compound (GIC) was studied by the de Haas - van Alphen (dHvA) effect in the temperature range 1.4 to 4.2 K with magnetic fields from 3 to 5 T. The observed dHvA oscillations possess frequencies of = 263 T, = 458 T, = 705 T and = 878 T. They are shown to result from Fermi surface pieces which are constructed from the zone folding of the two-dimensional free electron Fermi surface. The fragmentation of the Fermi surface is shown to be a consequence of the additional periodicity of a commensurate in-plane superlattice formed by the molecules. This ordering of molecules is a result of a phase transition which occurs upon cooling at approximately 260 K. This transition was identified by temperature dependent resistivity studies and by differential thermal analysis (DTA) of the stage-1 GIC sample. |
| Databáze: | OpenAIRE |
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