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Inelastic neutron scattering study of the anisotropicS=1spin chain[Ni(HF2)(3−Clpyridine)4]BF4
Physical Review B ( IF 3.2 ) Pub Date : 2020-03-27 , DOI: 10.1103/physrevb.101.094431
Daniel M. Pajerowski , Jamie L. Manson , Jacek Herbrych , Jesper Bendix , Andrey A. Podlesnyak , John M. Cain , Mark W. Meisel

[Ni(HF2)(3Clpyridine)4]BF4 (NBCT) is a one-dimensional, S=1 spin chain material that shows no magnetic neutron Bragg peaks down to temperatures of 0.1 K. Previous work identified NBCT as being in the Haldane phase and near a quantum phase transition as a function of D/J to the large-D quantum paramagnet phase (QPM), where D is the axial single-ion anisotropy and J is the intrachain superexchange. Herein, inelastic neutron scattering results are presented on partially deuterated, B11-enriched NBCT polycrystalline samples in zero magnetic field and down to temperatures of 0.3 K. Comparison to density matrix renormalization group calculations yields D/J=1.51 and a significant rhombic single-ion anisotropy E (E/D0.03, E/J0.05). These D, J, and E values place NBCT in the large-D QPM phase but precipitously near a quantum phase transition to a long-range ordered phase.

中文翻译:

各向异性S = 1自旋链[Ni(HF2)(3-氯吡啶)4] BF4的非弹性中子散射研究

[高频23-氯吡啶4]高炉4 (NBCT)是一维的, 小号=1个 自旋链材料在低至0.1 K的温度下无磁中子布拉格峰。先前的工作将NBCT确定为处于Haldane相并且接近于量子相变,这是NCF的函数。 d/Ĵ 到大d 量子顺磁相(QPM),其中 d 是轴向单离子各向异性,并且 Ĵ是链内超级交换。在此,非弹性中子散射结果在部分氘代中给出,11零磁场且温度低至0.3 K的高浓度NBCT多晶样品。与密度矩阵重整化组计算的比较得出 d/Ĵ=1.51 和明显的菱形单离子各向异性 ËË/d0.03 Ë/Ĵ0.05)。这些d ĴË 值将NBCT放在d QPM相却陡峭地接近量子相,过渡到长程有序相。
更新日期:2020-03-27
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