Na4Ir3O8 as a 3D spin liquid with fermionic spinons.
Spin liquid states for the spin-1/2 antiferromagnetic Heisenberg model on a hyperkagome lattice are studied. We classify and study flux states according to symmetries. Applying this model to Na4Ir3O8, we propose that the high temperature state may be described by a spinon Fermi surface, which forms a paired state with line nodes below 20 K. The possible mixed spin singlet and spin triplet pairing states are discussed according to the lattice symmetry which breaks inversion.
Zhou
Yi
Y
Department of Physics, Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, China.
Lee
Patrick A
PA
Ng
Tai-Kai
TK
Zhang
Fu-Chun
FC