Investigation of the dynamic Kagome ice emerged from a field along [1, 1, 1] in Nd2Hf2O7.

Pyrochlore compounds are considered to have an ideal crystal structure for 3D geometrical frustration, resulting in novel ground states. Spin ice, is one of the most striking ground states, with monopole- like excitations. Classical spin ice can be melted by quantum fluctuations introduced by non- Ising terms in the magnetic Hamiltonian. We have synthesized a high quality single crystal of Nd2Hf2O7 and performed successfully inelastic neutron scattering measurements in zero field. We solved the magnetic Hamiltonian with a model that classifies it as proximate to quantum spin ice with a dynamical pinch point mode. There are indications that a dynamic kagome ice state can emerge by applying field along the cube diagonal ([1,1,1] direction). Here we wish to explore this new state by applying fields along the [1,1,1].烧绿石（Pyrochlore）化合物被认为是适配三维几何阻挫的理想晶体体系，可衍生出诸多新奇的基态。自旋冰（Spin ice）便是其中最引人瞩目的基态之一，其展现出类单极子激发特性。经典自旋冰可被磁哈密顿量中非伊辛项引入的量子涨落所“熔化”。我们成功合成了高质量的Nd₂Hf₂O₇单晶体，并完成了零场条件下的非弹性中子散射测量。通过建模求解该磁哈密顿量，我们将其归类为具备动力学挤压点模式（dynamical pinch point mode）的近量子自旋冰体系。现有迹象表明，沿立方晶胞对角线（[1,1,1]方向）施加外磁场时，有望诱导出动态笼目冰（kagome ice）态。本文拟通过沿[1,1,1]方向施加外磁场，对这一新型物态展开探索研究。