Dynamics of linarite: Observations of magnetic excitations
Dynamics of linarite: Observations of magnetic excitations
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DOI：
10.1103/physrevb.95.024430
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发表时间：
2017-01-26
影响因子：
3.7
通讯作者：
Nishimoto, S.
中科院分区：
文献类型：
--
作者：
Rule, K. C.;Willenberg, B.;Nishimoto, S.
在此，我们提出了非弹性中子散射测量挫折，量子自旋1/2链材料linarite，PbCuSO_4（OH）（2）。飞行时间的数据，采取在0.5 K和零施加磁场揭示低能量色散自旋波激发低于1.5毫电子伏的平行和垂直的铜链方向。由此，我们确认，链间耦合内linarite是最近邻链内相互作用的10%左右。我们分析了线性自旋波理论和密度矩阵重整化群理论的数据，并建立了这种材料的主要磁交换相互作用和最简单的现实哈密顿量。
Herewe present inelastic neutron scattering measurements from the frustrated, quantum spin-1/2 chain material linarite, PbCuSO4(OH)(2). Time of flight data, taken at 0.5 K and zero applied magnetic field reveals low-energy dispersive spin wave excitations below 1.5 meV both parallel and perpendicular to the Cu-chain direction. From this we confirm that the interchain couplings within linarite are around 10% of the nearest neighbor intrachain interactions. We analyze the data within both linear spin-wave theory and density matrix renormalization group theories and establish the main magnetic exchange interactions and the simplest realistic Hamiltonian for this material.