TY - JOUR
T1 - Non-Abelian SU(2) gauge fields through density wave order and strain in graphene
AU - Gopalakrishnan, Sarang
AU - Ghaemi, Pouyan
AU - Ryu, Shinsei
PY - 2012/8/13
Y1 - 2012/8/13
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.86.081403
DO - 10.1103/PhysRevB.86.081403
M3 - Article
AN - SCOPUS:84865089699
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 8
M1 - 081403
ER -