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Orbital angular momentum monopoles appear in a chiral crystal
- Physicists in Germany and Switzerland have discovered orbital angular momentum monopoles within chiral crystals.
- Previously only theorized, the discovery could aid the development of energy-efficient memory devices.
- Traditional electronic devices transfer energy through the charge of electrons, which is energy-intensive.
- Orbitronics, however, exploits the electric currents generated by atomic nucleus OAM.
- These materials can be hard to come by, but Niels Schröter, a physicist at the Max Planck Institute of Microstructure Physics in Halle, Germany, explains that certain chiral topological semi-metals generate isotropic orbital magnetisation.
- The researchers' next task is to build prototype devices based on this, which could drive advancements in information technologies.
- Ciruclarly polarized X-rays were directed at materials' sample, and angles and energies of the emitted electrons were used to identify the structure's electronic make-up.
- One of the challenges was interpreting the CD-ARPES data, which was complicated.
- The CD-ARPES rotation around the monopoles as photon energy was varied demonstrated the presence of monopoles in the material.
- The researchers aim to establish a centre for chiral electronics with partners at the universities of Regensburg and Berlin.
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