Thin-layer films, due to their compatibility with plastic substrates, could serve modern high-frequency tech applications effectively. Bismuth thin films display a non-linear Hall effect, potentially enabling regulated terahertz signal use on electronic chips, hinting at tech applications.
Researchers from the University of Salerno and the Helmholtz-Zentrum Dresden-Rossendorf in Italy have found that elemental bismuth thin films exhibit the so-called non-linear
Among the many beneficial characteristics of bismuth that have not been discovered in other systems up to this point is the observation of theeffect at ambient temperature. Due to their ability to be put on plastic substrates, thin-layer films may find use in contemporary high-frequency technology applications.in response to an applied magnetic field perpendicular to the current and an electric current in the conductor is known as the Hall effect.
Most of these effects are caused by the material’s inherent magnetism or magnetic fields. However, in 2015, researchers found that the Hall effect is not always dependent on magnetism. “We achieve this with materials whose crystalline arrangement enables Hall voltages that are no longer linearly related to the current,” said Carmine Ortix, a professor at the Physics Department at the University of Salerno.
To further this, scientists from the two institutes collaborated to find appropriate materials and potential uses for this so-called non-linear Hall effect. The shared objective was to find a suitable material that is non-toxic, easy to handle and allows this quantum effect to arise in a regulated manner at room temperature.Various rounds of testing resulted in the team narrowing out an element that demonstrated these characteristics – bismuth.
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