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A model of magneto-electric multipoles

DOI: 10.1088/0953-8984/27/10/106001 DOI Help
PMID: 25705914 PMID Help

Authors: S. W. Lovesey (Diamond Light Source) , E. Balcar (Vienna University of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Condensed Matter , VOL 27

State: Published (Approved)
Published: February 2015

Abstract: A long-known Hamiltonian of electrons with entangled spin and orbital degrees of freedom is re-examined as a model of magneto-electric multipoles (MEs). In the model, a magnetic charge and simple quantum rotator are tightly locked in action, some might say they are enslaved entities. It is shown that MEs almost perfectly accord with those inferred from an analysis of magnetic neutron diffraction data on a ceramic superconductor (YBCO) in the pseudo-gap phase. Nigh on perfection between Stone's model and inferred MEs is achieved by addition to the original model of a crystal-field potential appropriate for the magnetic space group used in the published data analysis. An impression of thermal properties of multipoles is sought from a molecular-field model.

Journal Keywords: Magneto-electric multipoles; magnetic charge; neutron scattering

Subject Areas: Physics

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Added On: 08/02/2016 16:44

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