New Material Conduct Electricity at Speed of Light

...That's where another two-dimensional cousin - chromium germanium telluride (CGT) - comes in. Using what Xia calls the most sensitive magnetic microscope in the world - the fibre-optic Sagnac interferometer - the team observed a microscopic flake of CGT measuring just two atoms thick, several microns long, and a few microns across. To put that into perspective, the width of a single human hair ranges from approximately 17 to 180 microns. At temperatures of -233 degrees Celsius (-387 degrees Fahrenheit) the team was able to confirm and measure CGT's magnetic properties...