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arXiv 0903.2626cond-mat.str-el
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磁场中弱阻挫S=1/2二维海森堡反铁磁体的量子效应

Quantum effects in a weakly-frustrated S=1/2 two-dimensional Heisenberg antiferromagnet in an applied magnetic field

N. Tsyrulin, T. Pardini, R. R. P. Singh, F. Xiao, P. Link, A. Schneidewind, A. Hiess, C. P. Landee, M. M. Turnbull, M. Kenzelmann

摘要:

用中子非弹性散射和级数展开计算方法研究了二维S=1/2正方晶格反铁磁体$Cu(pz)_2(ClO_4)_2$。我们发现反铁磁次近邻相互作用的存在增强了与共振价键相关的量子涨落。中间磁场导致选择性调谐的共振价键和一个壮观的反转的区界色散,提供了新的见解二维反铁磁性的量子极限。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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