Superlattice Effects in Graphite Intercalation Compounds.
Annual rept. 1 Oct 84-30 Sep 85,
NORTHEASTERN UNIV BOSTON MASS DEPT OF PHYSICS
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A new kind of two-dimensional, field-induced phase transition has been discovered in Br2 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. The domains display a striking nonlinear dynamics in an a.c. magnetic field, with phenomena including resonance, hysteresis, and a quasiperiodic route to chaos. A theoretical basis for analyzing the data has been developed, and the high frequency resonance appears to be a transverse vibration of the domain array, similar to that predicted for the superconducting intermediate state. Keywords quantum hall effect solitons. Author
- Electricity and Magnetism
- Quantum Theory and Relativity