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arXiv 2001.03175cond-mat.str-el
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KErSe2和CsErSe2的晶场哈密顿量和各向异性

Crystal field Hamiltonian and anisotropy in KErSe2 and CsErSe2

A. Scheie, V. O. Garlea, L. D. Sanjeewa, J. Xing, A. S. Sefat

摘要:

我们使用中子散射和体性质测量来确定铜铁矿$\rm KErSe_2$和$\rm CsErSe_2$的单离子晶体场哈密顿量。这两个系统包含平面等边三角形Er晶格排列在两个堆叠变体:菱面体(K)或六边形(Cs)。我们的分析表明,无论堆叠顺序,这两种化合物表现出一个容易的平面基态双峰与大$J_z=1/2$条款和潜在的显着的量子效应,使它们的候选人量子自旋液体或其他奇异的基态。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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