arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.04967cond-mat.mtrl-scicond-mat.mes-hall
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手征反铁磁体Mn3Ge反常霍尔效应的压力调谐

Pressure tuning of the anomalous Hall effect in the chiral antiferromagnet Mn3Ge

R. D. dos Reis, M. Ghorbani Zavareh, M. O. Ajeesh, L. O. Kutelak, A. S. Sukhanov, Sanjay Singh, J. Noky, Y. Sun, J. E. Fischer, K. Manna, C. Felser, M. Nicklas

摘要:

报道了手征反铁磁体Mn $_3$ Ge中巨反常霍尔效应(AHE)的压力演化.源于Mn $_3$ Ge中的非零Berry曲率的AHE可以通过施加静水压力来连续调谐。在室温下,霍尔信号改变符号作为压力的函数,并完全消失在$p=1.53$ GPa。即使霍尔电导率在增加压力时改变符号,在2.85 GPa下的23 ${\rm Ω^{-1}cm^{-1}}$的室温饱和值也非常高,并且与在环境压力下的约40 ${\rm Ω^{-1}cm^{-1}}$的饱和值相当。霍尔电导率的变化可以直接与非共线三角形磁结构中Mn矩的面内分量的大小的逐渐变化相关联。因此,我们的研究结果提供了一种调谐的手征反铁磁锰$_3$锗的AHE的路线。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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