Anomalous transport properties of the antiferromagnetic Weyl semimetals Mn3X (X = Sn, Ge)
Noncollinear antiferromagnets Mn3X (X = Sn, Ge) are characterized by a large anomalous Hall effect originating from a large Berry curvature despite a vanishingly small magnetization. From recent first-principle theories, the large Berry curvature is predicted to be induced by a existence of Weyl nod...
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| Veröffentlicht in: | Journal of physics. Conference series 2022-03, Vol.2164 (1), p.012065 |
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| creator | Tomita, Takahiro Minami, Susumu Muhammad Ikhlas Nakamura, Hiroto Arita, Ryotaro Nakatsuji, Satoru |
| description | Noncollinear antiferromagnets Mn3X (X = Sn, Ge) are characterized by a large anomalous Hall effect originating from a large Berry curvature despite a vanishingly small magnetization. From recent first-principle theories, the large Berry curvature is predicted to be induced by a existence of Weyl nodes broken time-reversal symmetry. The large anomalous Nernst effect is also contributed by the magnetic Weyl state around the Fermi level EF, and likely shares its origin with the anomalous Hall effect. The thermoelectric transport S(T) and thermomagnetic transport Sji(T) are thus investigated in single crystals of Mn3X. Here, Mn3X exhibits a large anomalous Nernst effect; in particular, the signal magnitude of Mn3Ge exceeds 1μV/K, which is 1.5 times that of Mn3Sn. The Weyl properties are discussed by analyzing the thermal conductivity, specific heat, and Seebeck and Nernst effects. We also evaluate the zero-field Nernst-driven thermoelectric figure of merit for device applications in the antiferromagnets Mn3X. |
| doi_str_mv | 10.1088/1742-6596/2164/1/012065 |
| format | Article |
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From recent first-principle theories, the large Berry curvature is predicted to be induced by a existence of Weyl nodes broken time-reversal symmetry. The large anomalous Nernst effect is also contributed by the magnetic Weyl state around the Fermi level EF, and likely shares its origin with the anomalous Hall effect. The thermoelectric transport S(T) and thermomagnetic transport Sji(T) are thus investigated in single crystals of Mn3X. Here, Mn3X exhibits a large anomalous Nernst effect; in particular, the signal magnitude of Mn3Ge exceeds 1μV/K, which is 1.5 times that of Mn3Sn. The Weyl properties are discussed by analyzing the thermal conductivity, specific heat, and Seebeck and Nernst effects. 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Conference series</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tomita, Takahiro</au><au>Minami, Susumu</au><au>Muhammad Ikhlas</au><au>Nakamura, Hiroto</au><au>Arita, Ryotaro</au><au>Nakatsuji, Satoru</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anomalous transport properties of the antiferromagnetic Weyl semimetals Mn3X (X = Sn, Ge)</atitle><jtitle>Journal of physics. Conference series</jtitle><date>2022-03-01</date><risdate>2022</risdate><volume>2164</volume><issue>1</issue><spage>012065</spage><pages>012065-</pages><issn>1742-6588</issn><eissn>1742-6596</eissn><abstract>Noncollinear antiferromagnets Mn3X (X = Sn, Ge) are characterized by a large anomalous Hall effect originating from a large Berry curvature despite a vanishingly small magnetization. From recent first-principle theories, the large Berry curvature is predicted to be induced by a existence of Weyl nodes broken time-reversal symmetry. The large anomalous Nernst effect is also contributed by the magnetic Weyl state around the Fermi level EF, and likely shares its origin with the anomalous Hall effect. The thermoelectric transport S(T) and thermomagnetic transport Sji(T) are thus investigated in single crystals of Mn3X. Here, Mn3X exhibits a large anomalous Nernst effect; in particular, the signal magnitude of Mn3Ge exceeds 1μV/K, which is 1.5 times that of Mn3Sn. The Weyl properties are discussed by analyzing the thermal conductivity, specific heat, and Seebeck and Nernst effects. We also evaluate the zero-field Nernst-driven thermoelectric figure of merit for device applications in the antiferromagnets Mn3X.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1742-6596/2164/1/012065</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Antiferromagnetism Curvature Electromagnetism Figure of merit First principles Germanium Hall effect Metalloids Nernst-Ettingshausen effect Physics Single crystals Thermal conductivity Thermoelectricity Tin Transport properties |
| title | Anomalous transport properties of the antiferromagnetic Weyl semimetals Mn3X (X = Sn, Ge) |
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