Short-range correlations in the magnetic ground state of Na4Ir3O8

Rebecca Dally; Tom Hogan; Alex Amato; Hubertus Luetkens; Chris Baines; Jose Rodriguez-Rivera; Michael J. Graf; Stephen D. Wilson

doi:10.1103/PhysRevLett.113.247601

Short-range correlations in the magnetic ground state of Na4Ir3O8

Strongly Correlated Electrons 2015-03-02 v1

Authors: Rebecca Dally , Tom Hogan , Alex Amato , Hubertus Luetkens , Chris Baines , Jose Rodriguez-Rivera , Michael J. Graf , Stephen D. Wilson

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Abstract

The magnetic ground state of the hyper-kagome lattice in Na4Ir3O8 is explored via combined bulk magnetization, muon spin relaxation, and neutron scattering measurements. A short-range, frozen, state comprised of quasi-static moments develops below a characteristic temperature of T_F=6 K, revealing an inhomogeneous distribution of spins occupying the entirety of the sample volume. Quasi-static, 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 hyper-kagome lattice itself or stabilized via quantum fluctuations.

Keywords

hyper-kagome lattice magnetic ground state short-range correlations Na4Ir3O8 muon spin relaxation neutron scattering quantum spin liquid

Cite

@article{arxiv.1410.7072,
  title  = {Short-range correlations in the magnetic ground state of Na4Ir3O8},
  author = {Rebecca Dally and Tom Hogan and Alex Amato and Hubertus Luetkens and Chris Baines and Jose Rodriguez-Rivera and Michael J. Graf and Stephen D. Wilson},
  journal= {arXiv preprint arXiv:1410.7072},
  year   = {2015}
}

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5 pages, 4 figures

Short-range correlations in the magnetic ground state of Na4Ir3O8

Abstract

Keywords

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