Diabolical points in magnetic molecules: An exactly solvable model

Ersin Keçecioğlu, Anupam Garg

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


The magnetic molecule Fe8 has a rich pattern of degeneracies in its magnetic spectrum as the static magnetic field applied to it is varied. The points of degeneracy, or diabolical points in the magnetic field space, are found exactly in the simplest model Hamiltonian for this molecule. They are shown to form a perfect centered rectangular lattice, and to be multiply diabolical in general. The multiplicity is found. An earlier semiclassical solution to this problem is thereby shown to be exact in leading order in 1/J where J is the spin.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - Jan 23 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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