تقرير
Observation of flat and weakly dispersing bands in a van der Waals semiconductor Nb3Br8 with breathing kagome lattice
| العنوان: | Observation of flat and weakly dispersing bands in a van der Waals semiconductor Nb3Br8 with breathing kagome lattice |
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| المؤلفون: | Regmi, Sabin, Sakhya, Anup Pradhan, Fernando, Tharindu, Zhao, Yuzhou, Jeff, Dylan, Sprague, Milo, Gonzalez, Favian, Elius, Iftakhar Bin, Mondal, Mazharul Islam, Valadez, Nathan, Jarrett, Damani, Agosto, Alexis, Yang, Jihui, Chu, Jiun-Haw, Khondaker, Saiful I., Xu, Xiaodong, Cao, Ting, Neupane, Madhab |
| المصدر: | Phys. Rev. B 108, L121404 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Niobium halides, Nb3X8 (X = Cl,Br,I), which are predicted two-dimensional magnets, have recently gotten attention due to their breathing kagome geometry. Here, we have studied the electronic structure of Nb3Br8 by using angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations. ARPES results depict the presence of multiple flat and weakly dispersing bands. These bands are well explained by the theoretical calculations, which show they have Nb d character indicating their origination from the Nb atoms forming the breathing kagome plane. This van der Waals material can be easily thinned down via mechanical exfoliation to the ultrathin limit and such ultrathin samples are stable as depicted from the time-dependent Raman spectroscopy measurements at room temperature. These results demonstrate that Nb3Br8 is an excellent material not only for studying breathing kagome induced flat band physics and its connection with magnetism, but also for heterostructure fabrication for application purposes. Comment: 24 pages, 12 figures, Supplemental Material included |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.108.L121404 |
| URL الوصول: | http://arxiv.org/abs/2309.04865 |
| رقم الأكسشن: | edsarx.2309.04865 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.108.L121404 |
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