A New Type of Quasi Particle

 


New information was released last month about the nanoscale. A newly discovered quasi particle was found to be in all magnetic material, regardless of strength or temperature. Magnetism is not as stagnant as a once believed.

 The new article is titled, “Emergent Topological quasi particle kinetics in constricted nanomagnets.” It was published in the journal Physical Review Letters.

Deepak Singh and Carsten Ullrich are from the University of Missouri’s College of Arts and Science. Ullrich is a Curators’ Distinguished Professor of Physics and Astronomy. He reports, “ we’ve all seen the bubbles that form in sparkling water, or other carbonated drink products. The quasi particles are like those bubbles and we found that they can freely move around at remarkably fast speeds.”

The next generation of electronics will be faster, smarter, and even more energy efficient. The first challenge is to figure out how this finding could work into these processes.

One field that could greatly be improved from this technology is spintronics, or “spin electronics”. Traditional electronics use the electrical charge of electrons to process and store information. Spintronics uses the natural spin of electrons. This is a property that is linked to the quantum nature of electrons.

Singh is an associate professor of physics and astronomy who specializes in spintronics. He reports, “The spin nature of these electrons is responsible for the magnetic phenomena. Electrons have two properties: A charge and a spin. So, instead of using the conventional charge, we use the rotational, or spinning property. It’s more efficient because the spin dissipates much less energy than the charge.”

The team created models to explain the unique behavior of these quasi particles. They were able to observe the behavior using a powerful spectrometer at the Oak Ridge national laboratory. 

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