Many-body effects in topological Kondo insulators
作者： Jason Iaconis , Leon Balents
DOI: 10.1103/PHYSREVB.91.245127
关键词: Mean field theory 、 Topology 、 Kondo insulator 、 Topological insulator 、 Topological order 、 Impurity 、 Hamiltonian (quantum mechanics) 、 Condensed matter physics 、 Physics 、 Kondo effect 、 Anderson impurity model
摘要: We study the effect of interactions on properties a model 2D topological Kondo insulator phase. Loosely motivated by recent proposals where graphene is hybridized with impurity bands from heavy adatoms partially filled d-shells, we introduce Hamiltonian which believe captures essential physics different competing phases. show that there are generically three possible phases combinations screening and magnetic order. Perhaps most dramatic example many-body in symmetry protected existence exotic edge states. demonstrate our mean field contains region time-reversal invariant bulk phase but TR spontaneously broken at edge. Such would not be non-interacting model. also comment stability this beyond theory.
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