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Synthesis of a Structurally Perfect d1 Kagome Lattice Antiferromagnet, (CH3NH3)2NaTi3F12

submitted on 03.09.2019, 20:30 and posted on 06.09.2019, 01:43 by Ningxin Jiang, Arun Ramanathan, John Bacsa, Henry La Pierre

S = 1 /2 kagome lattice antiferromagnets (KLAFs) have attracted great interest since they are closely associated with the long-sought quantum spin liquid (QSL) state. The realization of S = 1/2 KLAF remains an outstanding challenge and efforts have focused principally on Cu2+, d9 compounds. Herein, the synthesis of the first structurally perfect d1 KLAF, (CH3NH3)2NaTi3F12, is presented. The trivalent oxidation state and the Jahn-Teller distortion of Ti3+ ions are probed by single crystal X-ray diffraction, X- ray photoelectron spectroscopy, and UV-vis-NIR diffuse reflectance. No structural phase transitions can be observed from 1.8 K to 523 K. However, a glass transition can be observed due to the disordered, interlayer CH3NH3+ cations. The Curie-Weiss temperature, θcw= -139.5(7) K, and the lack of long-range ordering in magnetic susceptibility and specific heat imply that this compound is a QSL candidate.


Beckman Young Investigator Award

National Science Foundation ECCS-1542174


Email Address of Submitting Author


Georgia Institute of Technology



ORCID For Submitting Author


Declaration of Conflict of Interest

The authors declare no competing interests.

Version Notes

This is the initial version.