2014/10/26 by Rebecca L. Dally, Rebecca Dally, Tom Hogan +10 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Condensed matter physics #Ground state #Multiferroics and related materials #Muon #Muon spin spectroscopy #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spins #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.113.247601
published as Phys. Rev. Lett. 113, 247601 (2014) · 5 pages, 4 figures
arxiv created 2014/10/26 · openalex publication_date 2014/12/08 · arxiv updated 2015/03/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The magnetic ground state of the J(eff)=1/2 hyperkagome lattice in Na₄Ir₃O₈ is explored via combined bulk magnetization, muon spin relaxation, and neutron scattering measurements. A short-range, frozen state comprised of quasistatic moments develops below a characteristic temperature of T(F)=6 K, revealing an inhomogeneous distribution of spins occupying the entirety of the sample volume. Quasistatic, short-range spin correlations persist until at least 20 mK and differ substantially from the nominally dynamic response of a quantum spin liquid. Our data demonstrate that an inhomogeneous magnetic ground state arises in Na₄Ir₃O₈ driven either by disorder inherent to the creation of the hyperkagome lattice itself or stabilized via quantum fluctuations.