Anomalous transverse response in Mn<sub>3</sub>X (X=Sn, Ge)
ORAL
Abstract
In ferromagnets, there is an Anomalous Hall Effect (AHE) due to spontaneous magnetization. Recently, in a family of nonlinear antiferromagnets, Mn3X (X=Sn, Ge), an unexpectedly large AHE has been detected and attributed to a nonvanishing Berry [1-3]. We present, a study of electric, thermoelectric and thermal transport in Mn3X (X=Sn, Ge). The three anomalous transverse conductivities (Hall, Nernst, and Righi-Leduc) were quantified. The thermal and electrical Hall conductivities respect the Wiedemann-Franz law over the whole temperature range of study in Mn3Sn [4]. We also carried out a study of angle-dependent AHE shedding additional light to the origin of anomalous transverse flow and their link to the locus of the Weyl nodes.
1. S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
2. A. K. Nayak et al., Sci. Adv. 2: e1501870 (2016).
3. N. Kiyohara, T. Tomita, and S. Nakatsuji, Phys. Rev. Appl. 5, 064009 (2016).
4. X. Li, L. Xu, L. Ding, J. Wang, M. Shen, X. Lu, Z. Zhu and K . Behnia, Phys. Rev. Lett.119, 056601 (2017)
1. S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
2. A. K. Nayak et al., Sci. Adv. 2: e1501870 (2016).
3. N. Kiyohara, T. Tomita, and S. Nakatsuji, Phys. Rev. Appl. 5, 064009 (2016).
4. X. Li, L. Xu, L. Ding, J. Wang, M. Shen, X. Lu, Z. Zhu and K . Behnia, Phys. Rev. Lett.119, 056601 (2017)
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Presenters
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Zengwei Zhu
- Wuhan National High Magnetic Field Center
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology
- National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology