Institute for Complex Systems - Sapienza - CNR

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ISC Sapienza Quantum Magnetism

Quantum Magnetism

Quantum antiferromagnets and more.


Unconventional antiferromagnetism due to Dzyaloshinskii-Moriya interactions

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The relevance of antisymmetric superexchange interactions in spin Hamiltonians describing quantum antiferromagnetic (AF) systems has been acknowledged long ago by Dzyaloshinskii. Soon after, Moriya showed that such interactions arise naturally in perturbation theory due to the spin-orbit coupling in magnetic systems with low symmetry. Nowadays, a number of AF systems are known to belong to the class of Dzyaloshinskii-Moriya (DM) magnets, such as ?-Fe2O3, LaMnO3 and K2V3O8, and to exhibit unusual and interesting magnetic properties in the presence of quantum fluctuations and/or applied magnetic field.

Last Updated on Thursday, 03 March 2011 11:07