Metal-insulator transition in 1T-TaS2-xSex

O. Shiino; T. Watanabe; T. Endo; T. Hanaguri; K. Kitazawa; M. Nohara; H. Takagi; C. Murayama; N. Takeshita; N. Môri; T. Hasegawa; W. Yamaguchi

doi:10.1016/S0921-4526(99)02846-X

Metal-insulator transition in 1T-TaS_2-xSe_x

O. Shiino, T. Watanabe, T. Endo, T. Hanaguri, K. Kitazawa, M. Nohara, H. Takagi, C. Murayama, N. Takeshita, N. Môri, T. Hasegawa, W. Yamaguchi

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

4 Citations (Scopus)

Abstract

The transition metal dichalcogenide, 1T-TaS₂, shows metal-insulator transition (MIT) accompanying the nearly commensurate (NC)-commensurate (C) charge density wave (CDW) phase transition at 180 K. It has been proposed that the low-temperature C-CDW phase is a Mott insulator. However, our specific heat and magnetic susceptibility measurements in the 1T-TaS_2-xSe_x system revealed no indications of effective mass enhancement or intrinsic localized spins in the insulating phase. So we propose a new model for the MIT in which the interlayer coupling of the CDW superstructure plays an important role.

Original language	English
Pages (from-to)	1673-1674
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART II
DOIs	https://doi.org/10.1016/S0921-4526(99)02846-X
Publication status	Published - 2000
Externally published	Yes

Keywords

1T-TaSSe
Charge density wave
Metal-insulator transition

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(99)02846-X

Cite this

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title = "Metal-insulator transition in 1T-TaS2-xSex",

abstract = "The transition metal dichalcogenide, 1T-TaS2, shows metal-insulator transition (MIT) accompanying the nearly commensurate (NC)-commensurate (C) charge density wave (CDW) phase transition at 180 K. It has been proposed that the low-temperature C-CDW phase is a Mott insulator. However, our specific heat and magnetic susceptibility measurements in the 1T-TaS2-xSex system revealed no indications of effective mass enhancement or intrinsic localized spins in the insulating phase. So we propose a new model for the MIT in which the interlayer coupling of the CDW superstructure plays an important role.",

keywords = "1T-TaSSe, Charge density wave, Metal-insulator transition",

author = "O. Shiino and T. Watanabe and T. Endo and T. Hanaguri and K. Kitazawa and M. Nohara and H. Takagi and C. Murayama and N. Takeshita and N. M{\^o}ri and T. Hasegawa and W. Yamaguchi",

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doi = "10.1016/S0921-4526(99)02846-X",

language = "English",

volume = "284-288",

pages = "1673--1674",

journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Metal-insulator transition in 1T-TaS2-xSex

AU - Shiino, O.

AU - Watanabe, T.

AU - Endo, T.

AU - Hanaguri, T.

AU - Kitazawa, K.

AU - Nohara, M.

AU - Takagi, H.

AU - Murayama, C.

AU - Takeshita, N.

AU - Môri, N.

AU - Hasegawa, T.

AU - Yamaguchi, W.

PY - 2000

Y1 - 2000

N2 - The transition metal dichalcogenide, 1T-TaS2, shows metal-insulator transition (MIT) accompanying the nearly commensurate (NC)-commensurate (C) charge density wave (CDW) phase transition at 180 K. It has been proposed that the low-temperature C-CDW phase is a Mott insulator. However, our specific heat and magnetic susceptibility measurements in the 1T-TaS2-xSex system revealed no indications of effective mass enhancement or intrinsic localized spins in the insulating phase. So we propose a new model for the MIT in which the interlayer coupling of the CDW superstructure plays an important role.

AB - The transition metal dichalcogenide, 1T-TaS2, shows metal-insulator transition (MIT) accompanying the nearly commensurate (NC)-commensurate (C) charge density wave (CDW) phase transition at 180 K. It has been proposed that the low-temperature C-CDW phase is a Mott insulator. However, our specific heat and magnetic susceptibility measurements in the 1T-TaS2-xSex system revealed no indications of effective mass enhancement or intrinsic localized spins in the insulating phase. So we propose a new model for the MIT in which the interlayer coupling of the CDW superstructure plays an important role.

KW - 1T-TaSSe

KW - Charge density wave

KW - Metal-insulator transition

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART II

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