论文标题
手性抗铁磁铁MN3GE中异常大厅效应的压力调节
Pressure tuning of the anomalous Hall effect in the chiral antiferromagnet Mn3Ge
论文作者
论文摘要
我们报告了手性抗铁磁铁MN $ _3 $ ge中巨型异常霍尔效应（AHE）的压力演变。源自MN $ _3 $ GE的非呈浆果曲率的AHE可以通过静水压力不断调节。在室温下，大厅信号随压力的函数而变化，并完全消失在$ p = 1.53 $ gpa。即使大厅的电导率在增加压力时发生了变化的迹象，但在2.85 GPA处的23 $ {\ rmω^{ - 1} cm^{ - 1} cm^{ - 1}} $的室温饱和值在2.85 GPA处的饱和值非常高且可与周围压力下的饱和值相当，约为40 $ {\ rmmmω^{\ rmω^{ - 1} cm} cm} cm}霍尔电导率的变化可以直接链接到非共线三角形磁性结构中MN矩的平面成分大小的逐渐变化。因此，我们的发现为手性抗铁磁Mn $ _3 $ ge中的AHE调整提供了一条路线。
We report on the pressure evolution of the giant anomalous Hall effect (AHE) in the chiral antiferromagnet Mn$_3$Ge. The AHE originating from the non-vanishing Berry curvature in Mn$_3$Ge can be continuously tuned by application of hydrostatic pressure. At room temperature, the Hall signal changes sign as a function of pressure and vanishes completely at $p=1.53$ GPa. Even though the Hall conductivity changes sign upon increasing pressure, the room-temperature saturation value of 23 ${\rm Ω^{-1}cm^{-1}}$ at 2.85 GPa is remarkably high and comparable to the saturation value at ambient pressure of about 40 ${\rm Ω^{-1}cm^{-1}}$. The change in the Hall conductivity can be directly linked to a gradual change of the size of the in-plane components of the Mn moments in the non-collinear triangular magnetic structure. Our findings, therefore, provide a route for tuning of the AHE in the chiral antiferromagnetic Mn$_3$Ge.
