A new kind of quasiparticles

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Researchers are interested in new material and the exotic behaviour of electrons because some of them could be suitable for applications in the electronics of the future. The aim is—for example with quantum computers—to achieve ever denser and faster storage and data transmission in the future and to reduce the energy consumption of electronic components.

Researchers at PSI have investigated a novel crystalline material that exhibits electronic properties that have never been seen before. It is a crystal of aluminum and platinum atoms arranged in a special way. In the symmetrically repeating unit cells of this crystal, individual atoms were offset from each other in such a way that they—as connected in the mind's eye—followed the shape of a spiral staircase. This resulted in novel properties of electronic behaviour for the crystal as a whole, including so-called Rarita-Schwinger fermions in its interior and very long and quadruple topological Fermi arcs on its surface. The researchers have now published their results in the journal Nature Physics.

 Niels Schröter (left) and Vladimir Strocov at their experimental station in the Swiss Light Source SLS at PSI. Credit: Paul Scherrer Institute/Mahir Dzambegovic


Updates Uploaded by ..Ajeet Vishwakarma
Department of Electronics and communication


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