Edge states and the integer quantum Hall effect of a spin-chiral ferromagnetic kagomé lattice with general spin coupling

Details Edge states and the integer quantum Hall effect of a spin-chiral ferromagnetic kagomé lattice with general spin coupling Edge states and the integer quantum Hall effect of a spin-chiral ferromagnetic kagomé lattice with general spin coupling

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11l3014w&link_type=abstract

New Journal of Physics, Volume 11, Issue 12, pp. 123014 (2009).

Physics

Scientific paper

The chiral edge states and the quantized Hall conductance (QHC) in the two-dimensional kagomé lattice with spin anisotropies included in a general Hund's coupling region are studied. This kagomé lattice system is periodic in the x-direction but has two edges in the y-direction. Numerical results show that the strength of Hund's coupling, as well as spin chirality, affects the edge states and the corresponding QHC. Within the topological edge theory, we express the QHC with the winding number of the chiral edge states on a Riemann surface. This expression is also compared with that within the topological bulk theory, and they are found to be consistent with each other.

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