Magnetic resonance as an orbital state probe
A. A. Mozhegorov, A. V. Larin, A. E. Nikiforov, L. E. Gontchar, A. V., Efremov
TL;DR
This paper demonstrates that magnetic resonance can directly identify the orbital ground state in ordered materials, using perovskite titanates as examples, and provides a theoretical foundation for this method.
Contribution
It introduces magnetic resonance as a novel, direct probe for distinguishing orbital states in ordered materials, supported by theoretical analysis and experimental spectra.
Findings
Resonance spectra depend qualitatively on orbital state
Orbital liquid and static orbital structures produce distinct spectra
Theoretical basis supports magnetic resonance as an orbital probe
Abstract
Magnetic resonance in ordered state is shown to be the direct method for distinguishing the orbital ground state. The example of perovskite titanates, particularly, LaTiO3 and YTiO3, is considered. External magnetic field resonance spectra of these crystals reveal glaring qualitative dependence on assumed orbital state of the compounds: orbital liquid or static orbital structure. Theoretical basis for using the method as an orbital state probe is grounded.
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