تقرير
Absence of ferromagnetism in VSe$_2$ caused by its charge density wave phase
| العنوان: | Absence of ferromagnetism in VSe$_2$ caused by its charge density wave phase |
|---|---|
| المؤلفون: | Fumega, Adolfo O., Gobbi, M., Dreher, P., Wan, W., González-Orellana, C., Peña-Díaz, M., Rogero, C., Herrero-Martín, J., Gargiani, P., Ilyn, M., Ugeda, M. M., Pardo, Victor, Blanco-Canosa, S. |
| المصدر: | J. Phys. Chem. C 2019, 123, 45, 27802-27810 |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | How magnetism emerges in low-dimensional materials such as transition metal dichalcogenides at the monolayer limit is still an open question. Herein, we present a comprehensive study of the magnetic properties of single crystal and monolayer VSe$_{2}$, both experimentally and \emph{ab initio}. Magnetometry, X-ray magnetic circular dichrosim (XMCD) and \emph{ab initio} calculations demonstrate that the charge density wave in bulk stoichiometric VSe$_{2.0}$ causes a structural distortion with a strong reduction in the density of sates at the Fermi level, prompting the system towards a non-magnetic state but on the verge of a ferromagnetic instability. In the monolayer limit, the structural rearrangement induces a Peierls distortion with the opening of an energy gap at the Fermi level and the absence of magnetic order. Control experiments on defect-induced VSe$_{2-\delta}$ single crystals show a breakdown of magnetism, discarding vacancies as a possible origin of magnetic order in VSe$_{2}$. Comment: polished version, updated acknowledgments |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1021/acs.jpcc.9b08868 |
| URL الوصول: | http://arxiv.org/abs/1907.02034 |
| رقم الأكسشن: | edsarx.1907.02034 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1021/acs.jpcc.9b08868 |
|---|