Graphene Discovery Could Unlock PC Chips 1,000x Faster Than Silicon
With the aid of ultra-fast laser imaging and a novel photoemission momentum microscope, physicists in Germany have successfully filmed light-driven quantum jumps in graphene for the first time.
In classical physics and semiconductor environments, electrons are bound to specific energy bands separated by forbidden zones, acting like a regular elevator restricted to designated floors. However, when subjected to intense light pulses, electrons can undergo what are known as Landau-Zener-Majorana (LZM) transitions. During these events, particles appear to teleport across energy gaps instantaneously, bypassing intermediate states entirely. It is roughly equivalent to riding said elevator where the floor indicator suddenly jumps from the first floor straight to the twentieth, without ever passing through the floors in between. Capturing this occurrence in real time, however, has eluded experts for the longest time.
Enter a team of researchers from the University of Regensburg, Philipps-Universität Marburg, and the Forschungszentrum Jülich who engineered a slow-motion...
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