تقرير
Correlation Driven Magnetic Frustration and Insulating Behavior of TiF$_3$
| العنوان: | Correlation Driven Magnetic Frustration and Insulating Behavior of TiF$_3$ |
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| المؤلفون: | Fernando, Gayanath W., Sheets, Donal, Hancock, Jason, Ernst, Arthur, Geilhufe, R. Matthias |
| المصدر: | Physica Status Solidi RRL 2300330, 2023 |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science, Physics - Computational Physics |
| الوصف: | We investigate the halide perovskite TiF$_3$, renowned for its intricate interplay between structure, electronic correlations, magnetism, and thermal expansion. Despite its simple structure, understanding its low-temperature magnetic behavior has been a challenge. Previous theories proposed antiferromagnetic ordering. In contrast, experimental signatures for an ordered magnetic state are absent down to 10~K. Our current study has successfully reevaluated the theoretical modeling of TiF$_3$, unveiling the significance of strong electronic correlations as the key driver for its insulating behavior and magnetic frustration. In addition, our frequency-dependent optical reflectivity measurements exhibit clear signs of an insulating state. Analysis of the calculated magnetic data gives an antiferromagnetic exchange coupling with a net Weiss temperature of order 25~K as well as a magnetic response consistent with a $S$=1/2 local moment per Ti$^{3+}$. Yet, the system shows no susceptibility peak at this temperature scale and appears free of long-range antiferromagnetic order down to 1~K. Extending ab initio modeling of the material to larger unit cells shows a tendency for relaxing into a non-collinear magnetic ordering, with a shallow energy landscape between several magnetic ground states, promoting the status of this simple, nearly cubic perovskite structured material as a candidate spin liquid. Comment: 6 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1002/pssr.202300330 |
| URL الوصول: | http://arxiv.org/abs/2310.12645 |
| رقم الأكسشن: | edsarx.2310.12645 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1002/pssr.202300330 |
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