Magnetic effect without a magnet

Nanowerk  February 22, 2021
An international team of researchers (Austria, Switzerland, Canada, USA – Rice University) found Ce3Bi4Pd3 produced a giant Hall effect in the total absence of any magnetic field and showed that the strange phenomenon is due to the complicated interaction of the electrons. Specific symmetries of the atoms determine the dispersion relation, the relationship between the energy of the electrons and their momentum. This complex interaction results in phenomena that mathematically look as if there are magnetic monopoles in the material which do not exist in this form in nature. But it has the effect of a strong magnetic field on the movement of the electrons. The effect had already been predicted theoretically for simpler materials. The team proved it in Ce3Bi4Pd3. results will enable the identification of electronic topological states in a broad range of strongly correlated quantum materials and may trigger efforts toward their exploitation in robust quantum electronics…read more. Open Access TECHNICAL ARTICLE

The material behaves as if magnetic monopoles were present. Credit: TU Vienna

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