Maple leaf antiferromagnet in a magnetic field
We analyze the quantum antiferromagnet on the maple leaf lattice in the presence of a magnetic field. Starting from its exact dimer ground state and for a magnetic field strength of the order of the local dimer spin-exchange coupling, we perform a strong-coupling expansion and extract an effective hard-core boson model. The interplay of effective many-body interactions, suppressed single-particle dynamics, and correlated hopping gives way to an intriguing series of superfluid to insulator transitions which correspond to magnetization plateaus in terms of the maple leaf spin degrees of freedom. While we find plateaus at intermediate magnetization to be dominated by bosonic density wave order, we conjecture plateau formation from multiboson bound states due to correlated hopping for lower magnetization.
WOS:001127183500003
2023-08-29
108
6
L060406
REVIEWED
EPFL
Funder | Grant Number |
Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) | 258499086-SFB 1170 |
Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter -ct.qmat | 390858490-EXC 2147 |
Swiss National Science Foundation | 182179 |