Intercalant ordering in the stage-1 indium chloride graphite intercalation compound
- Resource Type
- Authors
- W. R. Datars; P K Ummat; D. Marchesan; J D Palidwar
- Source
- Journal of Physics: Condensed Matter. 8:991-997
- Subject
- 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
- Language
- ISSN
- 1361-648X
0953-8984
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.