Temperature dependence of lattice parameters of α-(BEDT-TTF)
                        2
                        MHg(XCN)
                        4
                         (M = K, Rb, NH
                        4
                        , and X = S, Se)

S. Endo; Y. Watanabe; Takahiko Sasaki; T. Fukase; N. Toyota

doi:10.1016/S0379-6779(97)81003-X

Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se)

S. Endo, Y. Watanabe, Takahiko Sasaki, T. Fukase, N. Toyota

Research output: Contribution to journal › Conference article › peer-review

Abstract

The temperature dependence of lattice parameters in an isostructural series of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ : X = S, Se) has been studied from room temperature down to 11K by four-circle X-Ray diffraction measurements on single crystals. Only the superconducting NH ₄ Hg(SCN) ₄ salt shows a significant increase in the anisotropy ratio of c/a from 0.985 to 0.975 in the temperature range of 200K-50K, while all the other salts exhibiting a normal metallic or antiferromagnetic spin-density-wave ground state have the ratio of 0.990-0.985 almost independent of temperature. This difference in the in-plane lattice contraction could induce a topological difference of the Fermi surface at low temperature, via differently modulated transfer integrals.

Original language	English
Pages (from-to)	2013-2014
Number of pages	2
Journal	Synthetic Metals
Volume	86
Issue number	1 -3 pt 3
DOIs	https://doi.org/10.1016/S0379-6779(97)81003-X
Publication status	Published - 1997 Jan 1
Externally published	Yes
Event	Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3) - Snowbird, UT, USA Duration: 1996 Jul 28 → 1996 Aug 2

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(97)81003-X

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Endo, S., Watanabe, Y., Sasaki, T., Fukase, T., & Toyota, N. (1997). Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se) Synthetic Metals, 86(1 -3 pt 3), 2013-2014. https://doi.org/10.1016/S0379-6779(97)81003-X

Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se) . / Endo, S.; Watanabe, Y.; Sasaki, Takahiko; Fukase, T.; Toyota, N.

In: Synthetic Metals, Vol. 86, No. 1 -3 pt 3, 01.01.1997, p. 2013-2014.

Research output: Contribution to journal › Conference article › peer-review

Endo, S, Watanabe, Y, Sasaki, T, Fukase, T & Toyota, N 1997, ' Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se) ', Synthetic Metals, vol. 86, no. 1 -3 pt 3, pp. 2013-2014. https://doi.org/10.1016/S0379-6779(97)81003-X

Endo S, Watanabe Y, Sasaki T, Fukase T, Toyota N. Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se) Synthetic Metals. 1997 Jan 1;86(1 -3 pt 3):2013-2014. https://doi.org/10.1016/S0379-6779(97)81003-X

Endo, S. ; Watanabe, Y. ; Sasaki, Takahiko ; Fukase, T. ; Toyota, N. / Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se) In: Synthetic Metals. 1997 ; Vol. 86, No. 1 -3 pt 3. pp. 2013-2014.

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title = " Temperature dependence of lattice parameters of α-(BEDT-TTF) 2 MHg(XCN) 4 (M = K, Rb, NH 4 , and X = S, Se) ",

abstract = " The temperature dependence of lattice parameters in an isostructural series of α-(BEDT-TTF) 2 MHg(XCN) 4 (M = K, Rb, NH 4 : X = S, Se) has been studied from room temperature down to 11K by four-circle X-Ray diffraction measurements on single crystals. Only the superconducting NH 4 Hg(SCN) 4 salt shows a significant increase in the anisotropy ratio of c/a from 0.985 to 0.975 in the temperature range of 200K-50K, while all the other salts exhibiting a normal metallic or antiferromagnetic spin-density-wave ground state have the ratio of 0.990-0.985 almost independent of temperature. This difference in the in-plane lattice contraction could induce a topological difference of the Fermi surface at low temperature, via differently modulated transfer integrals. ",

author = "S. Endo and Y. Watanabe and Takahiko Sasaki and T. Fukase and N. Toyota",

year = "1997",

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T1 - Temperature dependence of lattice parameters of α-(BEDT-TTF) 2 MHg(XCN) 4 (M = K, Rb, NH 4 , and X = S, Se)

AU - Endo, S.

AU - Watanabe, Y.

AU - Sasaki, Takahiko

AU - Fukase, T.

AU - Toyota, N.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The temperature dependence of lattice parameters in an isostructural series of α-(BEDT-TTF) 2 MHg(XCN) 4 (M = K, Rb, NH 4 : X = S, Se) has been studied from room temperature down to 11K by four-circle X-Ray diffraction measurements on single crystals. Only the superconducting NH 4 Hg(SCN) 4 salt shows a significant increase in the anisotropy ratio of c/a from 0.985 to 0.975 in the temperature range of 200K-50K, while all the other salts exhibiting a normal metallic or antiferromagnetic spin-density-wave ground state have the ratio of 0.990-0.985 almost independent of temperature. This difference in the in-plane lattice contraction could induce a topological difference of the Fermi surface at low temperature, via differently modulated transfer integrals.

AB - The temperature dependence of lattice parameters in an isostructural series of α-(BEDT-TTF) 2 MHg(XCN) 4 (M = K, Rb, NH 4 : X = S, Se) has been studied from room temperature down to 11K by four-circle X-Ray diffraction measurements on single crystals. Only the superconducting NH 4 Hg(SCN) 4 salt shows a significant increase in the anisotropy ratio of c/a from 0.985 to 0.975 in the temperature range of 200K-50K, while all the other salts exhibiting a normal metallic or antiferromagnetic spin-density-wave ground state have the ratio of 0.990-0.985 almost independent of temperature. This difference in the in-plane lattice contraction could induce a topological difference of the Fermi surface at low temperature, via differently modulated transfer integrals.

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DO - 10.1016/S0379-6779(97)81003-X

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SP - 2013

EP - 2014

JO - Synthetic Metals

JF - Synthetic Metals

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IS - 1 -3 pt 3

T2 - Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3)

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ER -

Temperature dependence of lattice parameters of α-(BEDT-TTF) ₂ MHg(XCN) ₄ (M = K, Rb, NH ₄ , and X = S, Se)

Abstract

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