TY - JOUR
T1 - Quarter-filled honeycomb lattice with a quantized Hall conductance
AU - Murthy, Ganpathy
AU - Shimshoni, Efrat
AU - Shankar, R.
AU - Fertig, H. A.
PY - 2012/2/9
Y1 - 2012/2/9
N2 - We study a generic two-dimensional hopping model on a honeycomb lattice with strong spin-orbit coupling, without the requirement that the half-filled lattice be a topological insulator. For quarter-(or three-quarter) filling, we show that a state with a quantized Hall conductance generically arises in the presence of a Zeeman field of sufficient strength. We discuss the influence of Hubbard interactions and argue that spontaneous ferromagnetism (which breaks time reversal) will occur, leading to a quantized anomalous Hall effect.
AB - We study a generic two-dimensional hopping model on a honeycomb lattice with strong spin-orbit coupling, without the requirement that the half-filled lattice be a topological insulator. For quarter-(or three-quarter) filling, we show that a state with a quantized Hall conductance generically arises in the presence of a Zeeman field of sufficient strength. We discuss the influence of Hubbard interactions and argue that spontaneous ferromagnetism (which breaks time reversal) will occur, leading to a quantized anomalous Hall effect.
UR - https://www.scopus.com/pages/publications/84857699142
UR - https://www.scopus.com/pages/publications/84857699142#tab=citedBy
U2 - 10.1103/PhysRevB.85.073103
DO - 10.1103/PhysRevB.85.073103
M3 - Article
AN - SCOPUS:84857699142
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 7
M1 - 073103
ER -