Superlattice Effects in Graphite Intercalation Compounds.
Abstract
The research was motivated by the observation of anomalous mixing frequencies in the deHaas-van Alphen spectra of graphite intercalation compounds. We have made a very detailed analysis concentrating on compounds containing Bromone, which has extremely large anomalies. Three sources can produce these anomalies: - In many of our original samples, the very strong magnetic torques caused the samples to tilt in a magnetic field, and led to a torque instability, causing discontinuous jumps of sample position and hysteresis - In rigidly mounted samples, interband transfer causes significant lineshape distortion, which can be quantitatively accounted for by a simple theory. This theory confirms that the intercalation compound behaves as a true two-dimensional hose gas, with energy gaps between successive Landau levels. -Condon domain formation, a phase transition within the electron gas, remains the most intriguing possibility. We have shown that in two-dimensions it is closely related to the quantum Hall effect. While this mechanism has not yet been observed, we can now predict which intercalation compounds it will appear in.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 18, 1986
- Accession Number
- ADA176879
Entities
People
- R. S. Markiewicz
Organizations
- Northeastern University