Graphene Sandwich Accelerates Electrons ⚡ экспресс
In graphene, you can precisely control electron density, but inhomogeneities hinder studying their interactions at low concentrations. By using two graphene layers with an ultra-thin insulating layer of boron nitride, scientists achieved mutual screening of charge fluctuations, dramatically boosting carrier mobility. Quantum oscillations appeared in magnetic fields weaker than 1 mT, and the integer and fractional quantum Hall effects showed up at record-low fields (0.002 T). It's like two thin blankets layered on top of each other to smooth out wrinkles, letting you see the finest details. This result opens the door to exploring exotic quantum states.
Graphene is a carbon sheet just one atom thick, a fantastic conductor. But its surface is crinkly, like a wrinkled tablecloth that hasn't been ironed. Scientists built a 'sandwich': two of these sheets pressed together with a non-conductive spacer in between. They iron out each other's folds—like two halves of a sandwich making the surface perfectly even. Inside this atomically flat sandwich, electrons glide without a hitch.
But the real magic: in this ultrapure structure, electrons start to 'divide'. Their collective behavior creates particles with just one-third of the usual charge. It's not a trick—it's a key to the deep nature of matter and a step toward tomorrow's electronics.
🎯 Electrons in the graphene sandwich behave as if each split into three parts—this quantum phenomenon opens the door to particles with exotic properties.