K2Co2TeO6 : A layered magnet with a S=12Co2+ honeycomb lattice

Xu, Xianghan; Wu, Lijun; Zhu, Yimei; Cava, R. J.

doi:10.1103/physrevb.108.174432

K2 Co2 TeO6 : A layered magnet with a S= 12 Co 2+ honeycomb lattice

Journal Article · Sun Nov 19 23:00:00 EST 2023 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.108.174432· OSTI ID:2283308

^[1]; ^[2]; ^[2]; Cava, R. J. ^[1]

Princeton University, NJ (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

Recent observations of Kitaev interactions in d⁷ electron configurations have generated research interest in Co²⁺ based honeycomb magnets. Here, we report the synthesis of a K₂Co₂TeO₆ single crystal. X-ray diffraction and electron microscopy experiments show that K₂Co₂TeO₆ crystallizes in a $$P$$6₃/$mcm$ space group with undistorted honeycomb layers of Co²⁺ ions. Anisotropic magnetic and thermodynamic characterizations demonstrate an effective S = $$\frac{1}{2}$$ state of Co²⁺ at low temperature, competing magnetic phases, and weak magnetic transitions that can be suppressed by applying fields. Moreover, the interlayer K disorder level is tunable by thermal treatments, and it affects the magnetic features obviously. In conclusion, our findings provide a new and promising platform for studying Kitaev physics.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: SC0012704

OSTI ID:: 2283308

Report Number(s):: BNL--225249-2024-JAAM

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 17 Vol. 108; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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