Superlattice Effects in Graphite Intercalation Compounds
Abstract
A new kind of two-dimensional, field-induced phase transition has been discovered in diatomic bromine graphite intercalation compounds. Similar to, but much more pronounced than Condon domain formation in three-dimensions, it is a Landau level instability which results in two types of domains having different numbers of Landau levels occupied. Study of the dynamics of this phase has revealed a number of domain wall resonances, and strong sensitivity to pinning, with hysteresis observed in some samples. Analysis of the resonance suggests that the resistivity in the domain phase is considerably lower than in the normal phase -- possible confirmation of a theory that these domains are associated with a type of quantum Hall effect. In Arsenic penta fluoride- graphite, which displays a field-induced phase transition,x-ray studies reveal a variety of zero-field phase transitions including one which appears to be incommensurate along the c-axis. Keywords: Solitons.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 12, 1985
- Accession Number
- ADA217579
Entities
People
- R. S. Markiewicz
Organizations
- Northeastern University