Contents

12 August 2011
Vol 333, Issue 6044

About The Cover

Cover image expansion

COVER Low-energy (<10 millielectron volts) electronic spectra of bilayer graphene undergoing nematic phase transition from an isotropic, unperturbed form (top left) to an asymmetric form (bottom right). Electron-electron interactions in suspended graphene layers drive this transition, causing a change in the material's band structure and, thus, its electronic properties. See page 860. [Image: Kostya S. Novoselov/University of Manchester and Yael Fitzpatrick/Science]