تقرير
Giant shifts of crystal-field excitations with temperature as consequence of internal magnetic exchange fields
| العنوان: | Giant shifts of crystal-field excitations with temperature as consequence of internal magnetic exchange fields |
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| المؤلفون: | O'Brien, Joel, Deng, Guochu, Yu, Dehong, Ma, Xiaoxuan, Feng, Zhenjie, Ren, Wei, Cao, Shixun, Robinson, Robert A., McIntyre, Garry J., Ulrich, Clemens |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Crystal-field excitations, for example in transition-metal oxides where a rare-earth element is used as a spacer between the transition-metal-oxide tetrahedra and octahedra, are assumed to be extremely robust with respect to external perturbations such as temperature. Using inelastic neutron scattering experiments, a giant shift of the energy of the lowest crystal-field excitation of Er3+ (4I15/2) in ErFeO3 from 0.30(2) meV to 0.75(2) meV was measured below the magnetic-ordering temperature of erbium at 4.1 K. Quantum-mechanical point-charge calculations of the crystal-field levels indicate that the shift is caused by the internal magnetic field created by the erbium spins themselves, which causes a Zeeman splitting of the erbium 4f electronic levels, and therefore a change in the energies of crystal-field transitions. To verify this explanation, the effect of an external magnetic field on the crystal-field excitations was measured by inelastic neutron scattering and compared to the field-dependent point-charge calculations. The existence of an internal magnetic exchange interaction will have implications for a deeper understanding of a broader group of phenomena such as multiferroic properties or spin frustration, which are a consequence of various competing electronic and magnetic exchange interactions. Comment: Before submission we had contacted all co-authors repeatedly if they have any scientific comments, questions, or concerns. After submission one co-author did rise scientific concerns. Since we were not able to solve this, we would like to withdraw our manuscript |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2109.04610 |
| رقم الأكسشن: | edsarx.2109.04610 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |