论文标题
在缺陷的Al2O3上铀替代的巨型磁各向异性能量（0001）
Giant magnetic anisotropy energy and long coherence time of uranium substitution on defected Al2O3(0001)
论文作者
论文摘要
对于各种技术创新（例如量子信息游行和存储），需要具有巨大磁各向异性能量和长相干时间的纳米磁铁。基于第一原理的计算和模型分析，我们证明了Al2O3（0001）表面上的单个铀原子可以具有较高的结构稳定性，并且每个铀原子高达48 meV。由于磁化强度位于局部的F壳中，并且与邻居的化学键合中没有太多涉及，因此对于量子自旋状态而言，可以实现长达〜1.6 ms的长相干时间。这些结果提出了一种新的策略，用于在量子信息时代搜索用于不同应用的超湿磁单元。
Nanomagnets with giant magnetic anisotropy energy and long coherence time are desired for various technological innovations such as quantum information procession and storage. Based on the first-principles calculations and model analyses, we demonstrate that a single uranium atom substituting Al on the Al2O3(0001) surface may have high structural stability and large magnetic anisotropy energy up to 48 meV per uranium atom. As the magnetization resides in the localized f-shell and is not much involved in chemical bonding with neighbors, long coherence time up to ~1.6 mS can be achieved for the quantum spin states. These results suggest a new strategy for the search of ultrasmall magnetic units for diverse applications in the quantum information era.
