Abstract
is a unique case of a hyperkagome 3D corner sharing triangular lattice that can be decorated with quantum spins. It has spurred a lot of theoretical interest as a spin liquid candidate. We present a comprehensive set of NMR data taken on both the and sites. We show that disordered magnetic freezing of all Ir sites sets in below , well below , with a drastic slowing down of fluctuations to a static state revealed by our measurements. Above typically , physical properties are relevant to the spin liquid state induced by this exotic geometry. While the shift data show that the susceptibility levels off below 80 K, has little variation from 300 K to . We discuss the implication of our results in the context of published experimental and theoretical work.
- Received 14 February 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.047201
© 2015 American Physical Society