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Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates

Cornell Affiliated Author(s)

Author

K. Modic
B. Ramshaw
Jon Betts
Nicholas Breznay
James Analytis
Ross McDonald
Arkady Shekhter

Abstract

The complex antiferromagnetic orders observed in the honeycomb iridates are a double-edged sword in the search for a quantum spin-liquid: both attesting that the magnetic interactions provide many of the necessary ingredients, while simultaneously impeding access. Focus has naturally been drawn to the unusual magnetic orders that hint at the underlying spin correlations. However, the study of any particular broken symmetry state generally provides little clue about the possibility of other nearby ground states. Here we use magnetic fields approaching 100 Tesla to reveal the extent of the spin correlations in γ-lithium iridate. We find that a small component of field along the magnetic easy-axis melts long-range order, revealing a bistable, strongly correlated spin state. Far from the usual destruction of antiferromagnetism via spin polarization, the high-field state possesses only a small fraction of the total iridium moment, without evidence for long-range order up to the highest attainable magnetic fields. © 2017 The Author(s).

Date Published

Journal

Nature Communications

Volume

8

Issue

1

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026727122&doi=10.1038%2fs41467-017-00264-6&partnerID=40&md5=7a66c90fc0b44f5e0ce39c52f06cdc54

DOI

10.1038/s41467-017-00264-6

Group (Lab)

Brad Ramshaw Group

Funding Source

DR20160085
DMR-1157490
1157490
GBMF4374
DE-AC02-05CH11231

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