论文标题
Crystal Field Hamiltonian和Kerse2和Cserse2中的各向异性
Crystal field Hamiltonian and anisotropy in KErSe2 and CsErSe2
论文作者
论文摘要
我们使用中子散射和散装特性测量来确定Delafossites的单人水晶田hamiltonians $ \ rm kerse_2 $和$ \ rm cserse_2 $。这两个系统包含平面等边三角晶状体，它们排列在两个堆叠变体中：菱形（k）或六边形（CS）。 我们的分析表明，无论堆叠顺序如何，两种化合物都表现出易于平面的基态双线，$ j_z = 1/2 $术语，并且可能会产生重大量子效应，使它们成为量子旋转液体或其他外来的地面状态的候选者。
We use neutron scattering and bulk property measurements to determine the single-ion crystal-field Hamiltonians of delafossites $\rm KErSe_2$ and $\rm CsErSe_2$. These two systems contains planar equilateral triangular Er lattices arranged in two stacking variants: rhombohedral (for K) or hexagonal (Cs). Our analysis shows that regardless the stacking order both compound exhibit an easy-plane ground state doublet with large $J_z=1/2$ terms and the potential for significant quantum effects, making them candidates for quantum spin liquid or other exotic ground states.
