Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge

Nayak AK, Fischer JE, Sun Y, Yan B, Karel J, Komarek AC, Shekhar C, Kumar N, Schnelle W, Kuebler J, Felser C, Parkin SSP (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Science Advances American Association for the Advancement of Science

Book Volume: 2

Article Number: e1501870

Journal Issue: 4

DOI: 10.1126/sciadv.1501870

Abstract

It is well established that the anomalous Hall effect displayed by a ferromagnet scales with its magnetization. Therefore, an antiferromagnet that has no net magnetization should exhibit no anomalous Hall effect. We show that the noncolinear triangular antiferromagnet Mn3Ge exhibits a large anomalous Hall effect comparable to that of ferromagnetic metals; the magnitude of the anomalous conductivity is ∼500 (ohmcm) -1 at 2 K and ∼50 (ohmcm) -1 at room temperature. The angular dependence of the anomalous Hall effect measurements confirms that the small residual in-planemagneticmoment has no role in the observed effect except to control the chirality of the spin triangular structure. Our theoretical calculations demonstrate that the large anomalous Hall effect inMn3Ge originates from a nonvanishing Berry curvature that arises from the chiral spin structure, and that also results in a large spin Hall effect of 1100 (h/e) (ohmcm) -1, comparable to that of platinum. The present results pave the way toward the realization of room temperature antiferromagnetic spintronics and spin Hall effect-based data storage devices. 2016

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Technische Universität Darmstadt DE Germany (DE) Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE)

How to cite

APA:

Nayak, A.K., Fischer, J.E., Sun, Y., Yan, B., Karel, J., Komarek, A.C.,... Parkin, S.S.P. (2016). Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge. Science Advances, 2(4). https://doi.org/10.1126/sciadv.1501870

MLA:

Nayak, Ajaya K., et al. "Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge." Science Advances 2.4 (2016).

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