High-temperature magnetic anomaly in the Kitaev hyperhoneycomb compound β-Li2IrO3

Ruiz, Alejandro; Nagarajan, Vikram; Vranas, Mayia; Lopez, Gilbert; McCandless, Gregory T.; Kimchi, Itamar; Chan, Julia Y.; Breznay, Nicholas P.; Frañó, Alex; Frandsen, Benjamin A.; Analytis, James G.

doi:10.1103/PhysRevB.101.075112

High-temperature magnetic anomaly in the Kitaev hyperhoneycomb compound $β - {Li}_{2} {IrO}_{3}$

Journal Article · Tue Feb 11 23:00:00 EST 2020 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.101.075112· OSTI ID:1616112

Ruiz, Alejandro ^[1]; Nagarajan, Vikram ^[1]; Vranas, Mayia ^[1]; Lopez, Gilbert ^[1]; McCandless, Gregory T. ^[2]; Kimchi, Itamar ^[3]; Chan, Julia Y. ^[2]; Breznay, Nicholas P. ^[4]; Frañó, Alex ^[5]; Frandsen, Benjamin A. ^[6]; Analytis, James G. ^[1]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of Texas at Dallas, Richardson, TX (United States)
Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States). JILA
Harvey Mudd College, Claremont, CA (United States)
Univ. of California, San Diego, CA (United States)
Brigham Young Univ., Provo, UT (United States)

Here, we report the existence of a high-temperature magnetic anomaly in the three-dimensional Kitaev candidate material, $β - {Li}_{2} {IrO}_{3}$ . Signatures of the anomaly appear in magnetization, heat capacity, and muon spin relaxation measurements. The onset coincides with a reordering of the principal axes of magnetization, which is thought to be connected to the onset of Kitaev-like correlations in the system. The anomaly also shows magnetic hysteresis with a spatially anisotropic magnitude that follows the spin-anisotropic exchange anisotropy of the underlying Kitaev Hamiltonian. We discuss possible scenarios for a bulk and impurity origin.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF); Gordon and Betty Moore Foundation

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1616112

Alternate ID(s):: OSTI ID: 1599508

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 7 Vol. 101; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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