Quantum Hall effect becomes viscous in graphene

Researchers at The University of Manchester in the UK have discovered that the Hall effect—a phenomenon well known for more than a century—is no longer as universal as it was thought to be.

In the research paper published in Science this week, the group led by Prof Sir Andre Geim and Dr. Denis Bandurin found that the Hall effect can evenbesignifcantly, if electrons strongly interact with each other giving rise to a viscous flow. The new phenomenon is important at room temperature—something that can have important implications for when making electronic or optoelectronic devices.