Magnetic correlations in the semimetallic hyperkagome iridate Na3Ir3 O8

We present a microscopic study of a doped quantum spin liquid candidate, the hyperkagome Na3 Ir3 O8 compound, by using 23Na NMR. We determine the intrinsic behavior of the uniform q = 0 susceptibility via shift measurements and the dynamical response by probing the spin-lattice relaxation rate. Thro...

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Bibliographic Details
Published in:Physical review. B 2021-03, Vol.103 (10), p.1
Main Authors: Simutis, G, Takayama, T, Barthélemy, Q, Bert, F, Takagi, H, Mendels, P
Format: Article
Language:English
Subjects:
Antiferromagnetism
Correlation
Lattice vibration
NMR
Nuclear magnetic resonance
Spin dynamics
Spin liquid
Spin-lattice relaxation
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Summary:We present a microscopic study of a doped quantum spin liquid candidate, the hyperkagome Na3 Ir3 O8 compound, by using 23Na NMR. We determine the intrinsic behavior of the uniform q = 0 susceptibility via shift measurements and the dynamical response by probing the spin-lattice relaxation rate. Throughout the studied temperature range, the susceptibility is consistent with a semimetal behavior, though with electronic bands substantially modified by correlations. Remarkably, the antiferromagnetic fluctuations present in the insulating parent compound Na4 Ir3 O8 survive in the studied compound. The spin dynamics are consistent with 120 ∘ excitation modes displaying short-range correlations.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.103.L100404