Many-body instabilities and mass generation in slow Dirac materials

Article

关键词: TOPOLOGICAL KONDO-INSULATOR;    SURFACE;    SMB6;    GRAPHENE;    STATE;   

DOI  :  10.1103/PhysRevB.92.045401

来源: SCIE

【 摘 要 】

Some Kondo insulators are expected to possess topologically protected surface states with linear Dirac spectrum: the topological Kondo insulators. Because the bulk states of these systems typically have heavy effective electron masses, the surface states may exhibit extraordinarily small Fermi velocities that could force the effective fine structure constant of the surface states into the strong coupling regime. Using a tight-binding model, we study the many-body instabilities of these systems and identify regions of parameter space in which the system exhibits spin density wave and charge density wave order.

【 授权许可】

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