Structural deformation of the S=1 kagome-lattice compound KV3Ge2 O9

Eigo Takagi, Takuya Aoyama, Shigeo Hara, Hirohiko Sato, Tsuyoshi Kimura, Yusuke Wakabayashi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The dielectric and structural properties of the S=1 kagome antiferromagnet KV3Ge2O9 are examined. The low-temperature structure below 50 K is orthorhombic with a typical correlation length of 8 nm. While the high-temperature hexagonal phase can be considered C-centered orthorhombic, the C-centered symmetry is broken below 50 K. The low-temperature symmetry does not support the simplex solid state, which is the theoretically expected ground state for the S=1 kagome lattice. Above 60 K, incommensurate lattice modulation is observed. The lock-in transition suggests that the origin of the orthorhombic deformation is the development of a short-range magnetic ordering.

Original languageEnglish
Article number104416
JournalPhysical Review B
Issue number10
Publication statusPublished - 2017 Mar 15


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