Anomalous metallic state in the vicinity of metal to valence-bond solid insulator transition in LiVS2

N. Katayama; M. Uchida; D. Hashizume; S. Niitaka; J. Matsuno; D. Matsumura; Y. Nishihata; J. Mizuki; N. Takeshita; A. Gauzzi; M. Nohara; H. Takagi

doi:10.1103/PhysRevLett.103.146405

Anomalous metallic state in the vicinity of metal to valence-bond solid insulator transition in LiVS2

N. Katayama, M. Uchida, D. Hashizume, S. Niitaka, J. Matsuno, D. Matsumura, Y. Nishihata, J. Mizuki, N. Takeshita, A. Gauzzi, M. Nohara, H. Takagi

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Abstract

We investigate LiVS2 and LiVSe2 with a triangular lattice as itinerant analogues of LiVO2 known for the formation of a valence-bond solid (VBS) state out of an S=1 frustrated magnet. LiVS2, which is located at the border between a metal and a correlated insulator, shows a first order transition from a paramagnetic metal to a VBS insulator at Tc∼305K upon cooling. The presence of a VBS state in the close vicinity of insulator-metal transition may suggest the importance of itinerancy in the formation of a VBS state. We argue that the high temperature metallic phase of LiVS2 has a pseudogap, likely originating from the VBS fluctuation. LiVSe2 was found to be a paramagnetic metal down to 2 K.

Original language	English
Article number	146405
Journal	Physical Review Letters
Volume	103
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.103.146405
Publication status	Published - Oct 2 2009

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Physics and Astronomy(all)

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Anomalous metallic state in the vicinity of metal to valence-bond solid insulator transition in LiVS2. / Katayama, N.; Uchida, M.; Hashizume, D.; Niitaka, S.; Matsuno, J.; Matsumura, D.; Nishihata, Y.; Mizuki, J.; Takeshita, N.; Gauzzi, A.; Nohara, M.; Takagi, H.

In: Physical Review Letters, Vol. 103, No. 14, 146405, 02.10.2009.

Research output: Contribution to journal › Article › peer-review

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AU - Katayama, N.

AU - Uchida, M.

AU - Hashizume, D.

AU - Niitaka, S.

AU - Matsuno, J.

AU - Matsumura, D.

AU - Nishihata, Y.

AU - Mizuki, J.

AU - Takeshita, N.

AU - Gauzzi, A.

AU - Nohara, M.

AU - Takagi, H.

PY - 2009/10/2

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AB - We investigate LiVS2 and LiVSe2 with a triangular lattice as itinerant analogues of LiVO2 known for the formation of a valence-bond solid (VBS) state out of an S=1 frustrated magnet. LiVS2, which is located at the border between a metal and a correlated insulator, shows a first order transition from a paramagnetic metal to a VBS insulator at Tc∼305K upon cooling. The presence of a VBS state in the close vicinity of insulator-metal transition may suggest the importance of itinerancy in the formation of a VBS state. We argue that the high temperature metallic phase of LiVS2 has a pseudogap, likely originating from the VBS fluctuation. LiVSe2 was found to be a paramagnetic metal down to 2 K.

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Anomalous metallic state in the vicinity of metal to valence-bond solid insulator transition in LiVS2

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