Frozen State and Spin Liquid Physics in Na4Ir3O8: An NMR Study

A. C. Shockley, F. Bert, J-C. Orain, Y. Okamoto, and P. Mendels
Phys. Rev. Lett. 115, 047201 – Published 23 July 2015
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Abstract

Na4Ir3O8 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 Na23 and O17 sites. We show that disordered magnetic freezing of all Ir sites sets in below Tf7K, well below J=300K, with a drastic slowing down of fluctuations to a static state revealed by our T1 measurements. Above typically 2Tf, 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, 1/T1 has little variation from 300 K to 2Tf. We discuss the implication of our results in the context of published experimental and theoretical work.

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  • Received 14 February 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.047201

© 2015 American Physical Society

Authors & Affiliations

A. C. Shockley1,*, F. Bert1, J-C. Orain1, Y. Okamoto2, and P. Mendels1,†

  • 1Laboratoire de Physique des Solides, Université Paris-Sud 11, UMR CNRS 8502, 91405 Orsay, France
  • 2Department of Applied Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

  • *Corresponding author. acshoc@gmail.com
  • Corresponding author. philippe.mendels@u-psud.fr

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Issue

Vol. 115, Iss. 4 — 24 July 2015

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