Exposing graphene to a burst of deep-UV light makes it 100 times cleaner, instantly revealing 'hidden' states of matter.
April 1, 2026
Original Paper
Deep-UV bleaching of charge disorder in encapsulated graphene
arXiv · 2603.29891
The Takeaway
Graphene research has been stalled for a decade by microscopic impurities that mask its true properties. This 'bleaching' technique clears those impurities away, allowing scientists to see rare, exotic quantum behaviors that could be the key to ultra-stable quantum computers.
From the abstract
Disorder masks much of the rich physics in two-dimensional electronic systems, with charged impurities often the limiting factor. In graphene, progress in reducing disorder has largely stagnated since boron nitride encapsulation was introduced a decade ago. Here we show that a brief deep-UV exposure enhances the electronic quality of encapsulated graphene - typically by two orders of magnitude - by neutralizing charged impurities within boron nitride. Following illumination, standard graphene de