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

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article

41 Citations (Scopus)

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

ASJC Scopus subject areas

Physics and Astronomy(all)

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Katayama, N., Uchida, M., Hashizume, D., Niitaka, S., Matsuno, J., Matsumura, D., Nishihata, Y., Mizuki, J., Takeshita, N., Gauzzi, A., Nohara, M., & Takagi, H. (2009). Anomalous metallic state in the vicinity of metal to valence-bond solid insulator transition in LiVS2. Physical Review Letters, 103(14), [146405]. https://doi.org/10.1103/PhysRevLett.103.146405

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

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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.

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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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