تقرير
Quantum effects in a weakly-frustrated S=1/2 two-dimensional Heisenberg antiferromagnet in an applied magnetic field
| العنوان: | Quantum effects in a weakly-frustrated S=1/2 two-dimensional Heisenberg antiferromagnet in an applied magnetic field |
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| المؤلفون: | Tsyrulin, N., Pardini, T., Singh, R. R. P., Xiao, F., Link, P., Schneidewind, A., Hiess, A., Landee, C. P., Turnbull, M. M., Kenzelmann, M. |
| المصدر: | Phys. Rev. Lett. 102, 197201 (2009) |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We have studied the two-dimensional S=1/2 square-lattice antiferromagnet $Cu(pz)_2(ClO_4)_2$ using inelastic neutron scattering and series expansion calculations. We show that the presence of antiferromagnetic next-nearest neighbor interactions enhances quantum fluctuations associated with resonating valence bonds. Intermediate magnetic fields lead to a selective tuning of resonating valence bonds and a spectacular inversion of the zone-boundary dispersion, providing novel insight into 2D antiferromagnetism in the quantum limit. Comment: 4 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.102.197201 |
| URL الوصول: | http://arxiv.org/abs/0903.2626 |
| رقم الأكسشن: | edsarx.0903.2626 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.102.197201 |
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