2012/04/30 by Sarang Gopalakrishnan, Pouyan Ghaemi, Shinsei Ryu · 3 citations
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Density wave theory #Gauge theory #Graphene #Graphene research and applications #Landau quantization #Magnetic field #Materials science #Mathematics #Physics #Quantization (signal processing) #Quantum and electron transport phenomena #Quantum mechanics #Strain gauge #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.86.081403
published as Phys. Rev. B 86, 081403(R) (2012) · 5 pages, 3 figures
arxiv created 2012/04/30 · openalex publication_date 2012/08/13 · arxiv updated 2012/08/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Spatially varying strain patterns can qualitatively alter the electronic properties of graphene, acting as effective valley-dependent magnetic fields and giving rise to pseudo-Landau-level (PLL) quantization. Here, we show that the strain-induced magnetic field is one component of a non-Abelian SU(2) gauge field within the low-energy theory of graphene and identify the other two components as period-3 charge-density waves. We show that these density waves, if spatially varied, give rise to PLL quantization. We also argue that strain-induced magnetic fields can induce density-wave order in graphene, thus dynamically gapping out the lowest PLL; moreover, the ordering should generically be accompanied by dislocations. We discuss experimental signatures of these effects.