IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
Autor/es:
ARLEGO MARCELO; LAMAS CARLOS; ZHANG HAO
Lugar:
Buenos Aires
Reunión:
Congreso; LT27 - 27th International Conference on Low Temperature Physics; 2014
Resumen:
We study the frustrated Heisenberg model on the bilayer honeycomb lattice. The ground-state energy and spin gap are calculated, using different bosonic representations at mean field level and numerical calculations, to explore different sectors of the phase diagram. In particular we make use of a bond operator formalism and series expansion calculations to study the extent of dimer inter-layer phase. On the other hand we use the Schwinger boson method and exact diagonalization on small systems to analyze the evolution of on-layer phases. In this case we specifically observe a phase that presents a spin gap and short range NĂ©el correlations that survives even in the presence of non-zero next-nearest-neighbor interaction and inter-layer
rds']