论文标题
Terahertz的磁光光学研究对磁性挫败的TB2TI2O7的四极旋转效果
Terahertz Magneto-optical investigation of quadrupolar spin-lattice effects in magnetically frustrated Tb2Ti2O7
论文作者
论文摘要
自旋晶格耦合在量子旋转 - 易感性chlore tb2ti2O7的相图中的重要性一直是争论的话题。在这里，我们专注于振动耦合的方面，该方面发生在TB3+电子水平和横向声音子之间，通过研究它们沿着立方H111I方向应用的磁场的依赖性。我们的实验性THZ光谱测量结果，结合了定量理论量子计算，表明确实在3 K处观察到了振动效应。因此，在汉密尔顿的三型四极旋转晶格效应的分析中是相关的，在这种化合物中是相关的，这不再是光学上的异位型，但磁性双向双眼。
The significance of spin-lattice coupling in the phase diagram of the quantum spin-icepyrochlore Tb2Ti2O7 has been a topic of debate for some time. Here, we focus on the aspect of vibronic coupling, which occurs between the Tb3+ electronic levels and transverse acoustic phonons, by studying their dependence on a magnetic field applied along the cubic h111i direction. Our experimental THz spectroscopy measurements, combined with quantitative theoretical quantum calculations, show that indeed vibronic effects are observed at 3 K. An analysis incorporating quadrupolar spin-lattice effects in the Hamiltonian is therefore relevant in this compound, which is no longer optically isotropic but magnetically birefringent.
