Imaging chiral symmetry breaking from Kekulé bond order in graphene

Imaging chiral symmetry breaking from Kekulé bond order in graphene

Chirality—or ‘handedness’—is a symmetry property crucial to fields as diverse as biology, chemistry and high-energy physics. In graphene, chiral symmetry emerges naturally as a consequence of the carbon honeycomb lattice. This symmetry can be broken by interactions that couple electrons with opposite momenta in graphene. Here we directly visualize the formation of Kekulé bond order, one such ph...

Supplementary Information: Imaging chiral symmetry breaking from Kekulé bond order in graphene

Chiral symmetry breaking and charge order

A charge-density wave (CDW) is an ordered state that breaks translational symmetry and is characterized by a modulation in the electronic charge density as well as a corresponding modulation in the spacings of the underlying ionic lattice. It may be formed in a material if there exists a mechanism for transferring electrons from an electronlike part of their Fermi surface to a corresponding hol...

Chiral Symmetry and Chiral Symmetry Breaking*

Lectures presented at the session on " Recent Developments in Quantum Field Theory and Statistical Mechanics " of the Les Houches Summer School of Theoretical Physics August 1982 *Nork supported by the

Chiral Symmetry Breaking from Dyson-schwinger Equations

I report on recent progress in the study of mass generation in non-abelian gauge theories, and concentrate on the origin of constituent masses in QCD. I argue that a consistent formalism has been developed to describe chiral symmetry breaking via multiplicatively renormalisable Dyson-Schwinger equations. Its main consequence is the existence of a critical value of the coupling beyond which mass...