论文标题
经典Kagome Antiferromagnet Naba $ _ {2} $ Mn $ _ {3} $ f $ _ {11} $
Zero-energy excitation in the classical kagome antiferromagnet NaBa$_{2}$Mn$_{3}$F$_{11}$
论文作者
论文摘要
我们对经典的kagome抗fiferromagnet naba $ _ {2} $ mn $ _ {3} $ f $ _ {11} $进行了不弹性的中子散射测量测量，以调查与旋转旋转旋转旋转旋转相关的无效零含量激发的可能性。观察到的光谱确实表现出这种激发，在低能量时强度强，并且在高能量时强度较弱的色散激发。将测量结果与线性自旋波理论的计算结合在一起表明，NABA $ _ {2} $ Mn $ _ {3} $ f $ _ {11} $是对经典的Kagome Antiferromagnet的很好的实现，它表现出通过磁性Dipole-dipole-dipole互动提升的无分散模式。
We performed inelastic neutron scattering measurements on a polycrystalline sample of a classical kagome antiferromagnet NaBa$_{2}$Mn$_{3}$F$_{11}$ to investigate the possibility of a dispersionless zero-energy excitation associated with rotation of spins along the chains. The observed spectra indeed exhibit such an excitation with strong intensity at low energy, as well as dispersive excitations with weak intensity at high energy. Combining the measurements with calculations from linear spin-wave theory reveals that NaBa$_{2}$Mn$_{3}$F$_{11}$ is a good realization of the classical kagome antiferromagnet which exhibits a dispersionless mode lifted by the magnetic dipole-dipole interaction.
