2011/07/24 by Fan Zhang, Allan H. MacDonald, A. H. MacDonald · 67 citations
Chemistry · Materials Science · Physics and Astronomy · #Antiferromagnetism #Bilayer #Bilayer graphene #Chemistry #Condensed matter physics #Electric field #Graphene #Graphene research and applications #Ground state #Magnetic field #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Symmetry (geometry) #Topological Materials and Phenomena #Zeeman effect #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.108.186804
published in Physical Review Letters 108(18), 186804 (American Physical Society) · 4 pages 3 figures and 1 table, submitted and to appear
arxiv created 2011/07/24 · openalex publication_date 2012/05/02 · arxiv updated 2013/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Chirally stacked N-layer graphene with N≥2 is susceptible to a variety of distinct broken symmetry states in which each spin-valley flavor spontaneously transfers charge between layers. In mean-field theory, one of the likely candidate ground states for a neutral bilayer is the layer antiferromagnet that has opposite spin polarizations in opposite layers. In this Letter, we analyze how the layer antiferromagnet and other competing states are influenced by Zeeman fields that couple to spin and by interlayer electric fields that couple to layer pseudospin, and comment on the possibility of using Zeeman responses and edge state signatures to identify the character of the bilayer ground state experimentally.