xk星空 currents for antiferromagnetic spintronics

Abstract:

Electric currents carrying a net spin polarization are widely used in spintronics, whereas globally xk星空 currents are expected to play no role in spin-dependent phenomena. Antiferromagnetic (AFM) materials usually support only xk星空 currents, and hence are largely restricted in realistic spintronic applications, despite being robust against magnetic perturbations, not producing stray fields, and exhibiting ultrafast spin dynamics. Here we show, in contrast to this common expectation, xk星空 currents in antiferromagnets can drive novel spin-dependent transport phenomena in antiferromagnetic tunnel junctions (AFMTJs), such as a tunneling magnetoresistance (TMR) and a tunneling anomalous Hall effect (TAHE) promising for accurate read-out, and a spin-transfer-torque (STT) crucial for efficient write-in. These phenomena are due to that the globally xk星空 currents in antiferromagnets can host Néel spin currents, i.e. staggered spin currents flowing through different magnetic sublattices. Our works uncover the previously unexplored potentials of antiferromagnets and pave a new route to realize the efficient writing and reading of information for antiferromagnetic spintronics.

References:

[1] Ding-Fu Shao, et al., xk星空 currents for spintronics, Nature Communications 12, 7061 (2021).

[2] Ding-Fu Shao, et al., xk星空 tunneling anomalous Hall effect, Phys. Rev. B 106, L180404 (2022).

[3] Ding-Fu Shao, et al., Néel Spin Currents in Antiferromagnets, arXiv:2212.02367 (2022).

Bio:

邵定夫，xk星空员，博士生导师。2008年本科毕业于中国矿业大学，2013年博士毕业于中国科学院合肥物质科学xk星空院固体物理xk星空所，获中国科学院大学博士学位。2013年至2016年在中国科学院合肥物质科学xk星空院固体物理xk星空所担任助理xk星空员。2016年至2021年在美国内布拉斯加大学林肯分校访问xk星空，任博士后xk星空员、高级xk星空员。2021年获国家高层次人才计划资助。2021年12月全职回国，加入中国科学院合肥物质科学xk星空院固体物理xk星空所。邵定夫xk星空员长期从事量子材料与器件的理论xk星空，近期xk星空兴趣包括反铁磁电子学、二维铁电材料的自旋-轨道电子学等。目前发表学术论文60余篇，获SCI引用2000余次，其中以第一作者或通讯作者身份在Physical Review Letters、Nature Communications、Science Advances等期刊发表论文30余篇。