Quantum Electrodynamics and the Origins of the Exchange, Dipole-Dipole, and Dzyaloshinsky-Moriya Interactions in Itinerant Fermion Systems - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: It is shown how the exchange interaction, the dipole-dipole interaction, andthe Dzyaloshinsky-Moriya interaction between electronic spin-densityfluctuations emerge naturally from a field-theoretic framework that coupleselectrons to the fluctuating electromagnetic potential. Semi-quantitativeestimates are given to determine when the dipole-dipole interaction, which isoften neglected, needs to be considered, and various applications arediscussed, with an emphasis on weak ferromagnets and on helimagnets.



Author: D. Belitz, T.R. Kirkpatrick

Source: https://arxiv.org/







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