Computers with no need of cooling? They haven’t come into existence yet.
However, physicists of the University of Würzburg are paving the way for them: In the American scientific journal “Science”, the researchers now present a semiconductor that transmits electric current without heating up in the process.
This new type of semiconductor consists of mercury telluride and mercury cadmium telluride. In a sophisticated procedure, the Würzburg physicists apply these two materials to penny-sized crystal wafers in alternate ultra-thin layers. “The individual layers are only seven to ten nanometers thin,” says Professor Laurens Molenkamp. In other words, inconceivably fine: A nanometer is one millionth of a millimeter.
Tiny wire fabricated
In order to analyze the conductivity of the layered material, …