INVESTIGADORES
ARLEGO Marcelo Jose Fabian
artículos
Título:
Quantum phase diagram of a frustrated antiferromagnet on the bilayer honeycomb lattice
Autor/es:
ZHANG HAO; LAMAS CARLOS; ARLEGO MARCELO; BRENIG WOLFRAM
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Lugar: New York; Año: 2016 vol. 93 p. 5150 - 5161
ISSN:
0163-1829
Resumen:
We study the spin-1/2 Heisenberg antiferromagnet on a bilayer honeycomb lattice including interlayer frustration. Using a set of complementary approaches, namely, Schwinger bosons, dimer series expansion, bond operators, and exact diagonalization, we map out the quantum phase diagram. Analyzing ground-state energies and elementary excitation spectra, we find four distinct phases, corresponding to three collinear magnetic long-range ordered states, and one quantum disordered interlayer dimer phase. We detail that the latter phase is adiabatically connected to an exact singlet product ground state of the bilayer, which exists along a line of maximum interlayer frustration. The order within the remaining three phases will be clarified.
