تقرير
Ba8CoNb6O24: a spin-1/2 triangular-lattice Heisenberg antiferromagnet in the 2D limit
| العنوان: | Ba8CoNb6O24: a spin-1/2 triangular-lattice Heisenberg antiferromagnet in the 2D limit |
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| المؤلفون: | Rawl, R., Ge, L., Agrawal, H., Kamiya, Y., Cruz, C. R. Dela, Butch, N. P., Sun, X. F., Lee, M., Choi, E. S., Oitmaa, J., Batista, C. D., Mourigal, M., Zhou, H. D., Ma, J. |
| المصدر: | Phys. Rev. B 95, 060412 (2017) |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The perovskite Ba8CoNb6O24 comprises equilateral effective spin-1/2 Co2+ triangular layers separated by six non-magnetic layers. Susceptibility, specific heat and neutron scattering measurements combined with high-temperature series expansions and spin-wave calculations confirm that Ba8CoNb6O24 is basically a twodimensional (2D) magnet with no detectable spin anisotropy and no long-range magnetic ordering down to 0.06 K. In other words, Ba8CoNb6O24 is very close to be a realization of the paradigmatic spin-1/2 triangular Heisenberg model, which is not expected to exhibit symmetry breaking at finite temperature according to the Mermin and Wagner theorem. Comment: 8 pages, 5 figures with SI |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.95.060412 |
| URL الوصول: | http://arxiv.org/abs/1612.04117 |
| رقم الأكسشن: | edsarx.1612.04117 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.95.060412 |
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