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arXiv · 1907.04948

Magnetic-field control of topological electronic response near room temperature in correlated Kagome magnets

Yangmu Li·Qi Wang·Lisa DeBeer-Schmitt·Zurab Guguchia·Ryan D. Desautels·Jiaxin Yin·Qianheng Du·Weijun Ren·Xinguo Zhao·Zhidong Zhang·Igor A. Zaliznyak·Cedomir Petrovic·Weiguo Yin·M. Zahid Hasan·Hechang Lei·John M. Tranquada
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Abstract

Strongly correlated Kagome magnets are promising candidates for achieving controllable topological devices owing to the rich interplay between inherent Dirac fermions and correlation-driven magnetism. Here we report tunable local magnetism and its intriguing control of topological electronic response near room temperature in the Kagome magnet Fe3Sn2 using small angle neutron scattering, muon spin rotation, and magnetoresistivity measurement techniques. The average bulk spin direction and magnetic domain texture can be tuned effectively by small magnetic fields. Magnetoresistivity, in response, exhibits a measurable degree of anisotropic weak localization behavior, which allows the direct control of Dirac fermions with strong electron correlations. Our work points to a novel platform for manipulating emergent phenomena in strongly-correlated topological materials relevant to future applications.

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Yangmu Li, Qi Wang, Lisa DeBeer-Schmitt, Zurab Guguchia, Ryan D. Desautels, Jiaxin Yin, Qianheng Du, Weijun Ren, Xinguo Zhao, Zhidong Zhang, Igor A. Zaliznyak, Cedomir Petrovic, Weiguo Yin, M. Zahid Hasan, Hechang Lei, John M. Tranquada. 2019-07-10. Magnetic-field control of topological electronic response near room temperature in correlated Kagome magnets. https://doi.org/10.1103/physrevlett.123.196604

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