Possible Weyl fermions in the magnetic Kondo system CeSb
Condensed matter: Magnetic collectivity A signature of an exotic state of matter is identified in a magnetic material by researchers in China and Germany. The results from Huiqiu Yuan from Zhejiang University and co-workers indicate a new class of topological materials. In the right circumstances, t...
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| Autores principales: | , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Nature Portfolio
2017
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/1a212934a9a54c159b4b8667014a0df2 |
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| Sumario: | Condensed matter: Magnetic collectivity A signature of an exotic state of matter is identified in a magnetic material by researchers in China and Germany. The results from Huiqiu Yuan from Zhejiang University and co-workers indicate a new class of topological materials. In the right circumstances, the electrons in a material work collectively to behave like particles known as Weyl fermions. Weyl fermions have effectively no mass, making them a fascinating test-bed for novel physics. Yuan and colleagues observed a pronounced negative magnetoresistance when a magnetic field was applied in a direction parallel to an electric current passing through caesium antimonide at low temperature. This signature of a Weyl-fermion state was further supported by electronic-structure calculations. While these evasive particles have been identified in a number of materials in the past, caesium antimonide is different because it is ferromagnetic. |
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