论文标题
带有J $ _ {eff} $ = 1/2的完美Kagome-lattice Antiferromagnets：
Perfect kagome-lattice antiferromagnets with J$_{eff}$ = 1/2: The Co$^{2+}$-analogs of copper minerals volborthite and vesignieite
论文作者
论文摘要
我们报告Co $ $^{2+}的合成，晶体结构和磁性特性研究的量子kagome磁铁volborthite cu $ _3 $ _2 $ _2 $ o $ _7 $（哦）$ _ 2 $ _ 2 $ _ 2 $ \ cdot $ 2H $ _2 $ _2 $ o和vesignieite bacu $ _3 $（vo $ $ _4 $）对于每种化合物，基态似乎是A型抗磁磁性顺序。在低温下，应用磁场会导致元磁样过渡，通过过渡描述，在该过渡中，抗磁磁相位的倾斜矩会变为铁磁与磁磁相位。这些地面和野外诱导的状态包括垂直于Dzyaloshinskii-Moriya相互作用的倾斜的铁磁成分。这些磁性特性的特征是J $ _ {eff} $ = 1/2物理学。我们的发现将是阐明J $ _ {eff} $ = 1/2 kagome物理学的第一步，这在实验或理论上很少研究。
We report the synthesis, crystal structure, and magnetic properties of Co$^{2+}$ kagome magnets Co$_3$V$_2$O$_7$(OH)$_2$$\cdot$2H$_2$O and BaCo$_3$(VO$_4$)$_2$(OH)$_2$, which can be recognized as Co-analogues of the intensively researched quantum kagome magnet volborthite Cu$_3$V$_2$O$_7$(OH)$_2$$\cdot$2H$_2$O and vesignieite BaCu$_3$(VO$_4$)$_2$(OH)$_2$. For each compound, the ground state is seemingly A-type antiferromagnetic order. At low temperatures, applying a magnetic field causes a metamagnetic-like transition described by the transition in which antiferromagnetically-aligned canted moments change to ferromagnetically-aligned ones. These ground and field-induced states include a canted ferromagnetic component perpendicular to the kagome planes favored by Dzyaloshinskii-Moriya interactions. These magnetic properties are well characterized by the J$_{eff}$ = 1/2 physics. Our findings will be the first step toward clarifying the J$_{eff}$ = 1/2 kagome physics, which has been little studied experimentally or theoretically.
