论文标题
NMR探测的沮丧的Spin-1/2链中的竞争磁性阶段$β$ -TEVO $ _4 $
Competing magnetic phases in the frustrated spin-1/2 chain compound $β$-TeVO$_4$ probed by NMR
论文作者
论文摘要
在沮丧的自旋-1/2链中，最近和下一个最邻居交换的交流之间的竞争导致了丰富的相图，在其物质实现中存在扰动的情况下，它变得更加丰富。这些效果仍然没有探索，因此高度期望对静态和动态磁性的新见解，尤其是通过敏感的局部探针。在这里，我们提出了一项全面的$^{17} $ o $β$ -TEVO $ _4 $的核磁共振研究，其中主交换相互作用的各向异性和其他弱链交换相互作用补充了理论相图。我们的结果证实了先前研究中报道的有趣的自旋条纹阶段的动力学性质。此外，我们发现高景相中的磁顺序在磁化饱和度以下的发展与旋转密度波（SDW）的异常类型一致，并在相邻链上具有不同的磁矩对齐。这让人联想到在没有磁场的情况下实现的SDW相中的排序，因此很可能是通过磁各向异性稳定的。
In frustrated spin-1/2 chains the competition between the nearest- and next-nearest-neighbor exchange interactions leads to a rich phase diagram that becomes even richer in the presence of perturbations in their material realizations. These effects are still largely unexplored, so that new insight into static and dynamic magnetism, in particular by sensitive local probes, is highly desired. Here we present a comprehensive $^{17}$O nuclear magnetic resonance study of $β$-TeVO$_4$, where the anisotropy of the main exchange interactions and additional weak interchain exchange interactions complement the theoretical phase diagram. Our results confirm the dynamical nature of the intriguing spin-stripe phase that has been reported in previous studies. In addition, we find that the magnetic order in the high-field phase, which develops just below the magnetization saturation, is consistent with an unusual type of spin-density-wave (SDW) order with different alignments of the magnetic moments on the neighboring chains. This is reminiscent of the ordering in the SDW phase, realized in the absence of the magnetic field, and is thus most likely stabilized by magnetic anisotropy.
