Pressure stabilized Se-Se dimer formation in PbSe2

M. Bremholm; Y. S. Hor; R. J. Cava

doi:10.1016/j.solidstatesciences.2010.10.003

Pressure stabilized Se-Se dimer formation in PbSe₂

M. Bremholm, Y. S. Hor, R. J. Cava

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

15 Scopus citations

Abstract

The preparation of PbSe₂ through the reaction of PbSe with excess Se at 4.5 GPa and 650 °C is reported. The crystal structure, determined from X-ray powder diffraction data (CuAl₂ structure type, I4/mcm (#140), a = 6.42695(11) , c = 7.70254(13) , Z = 4), consists of layers of [Se₂]^2- dimers with Pb²⁺ in square antiprismatic coordination with Se. This is a rare crystal structure for divalent metal chalcogenides, previously only identified for SrS₂ and BaTe₂. Undoped PbSe₂ as well as Bi³⁺- and Ag⁺-doped samples (10% Pb substitution) show semi-metallic resistivity down to 0.4 K. Magnetic susceptibility measurement of PbSe ₂ shows no magnetic ordering above 1.8 K. The Seebeck coefficients show nearly linear behavior from 35 to 400 K and the largest numerical values are found in the case of undoped PbSe₂, + 99 μVK^-1, and Bi³⁺-doped PbSe₂, - 146 μVK^-1, at the highest temperature measured, 400 K.

Original language	English (US)
Pages (from-to)	38-41
Number of pages	4
Journal	Solid State Sciences
Volume	13
Issue number	1
DOIs	https://doi.org/10.1016/j.solidstatesciences.2010.10.003
State	Published - Jan 2011

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

Keywords

Diselenide
High pressure
Lead dichalcogenide
Selenium dimer
X-ray diffraction

Access to Document

10.1016/j.solidstatesciences.2010.10.003

Cite this

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title = "Pressure stabilized Se-Se dimer formation in PbSe2",

abstract = "The preparation of PbSe2 through the reaction of PbSe with excess Se at 4.5 GPa and 650 °C is reported. The crystal structure, determined from X-ray powder diffraction data (CuAl2 structure type, I4/mcm (#140), a = 6.42695(11) , c = 7.70254(13) , Z = 4), consists of layers of [Se2]2- dimers with Pb2+ in square antiprismatic coordination with Se. This is a rare crystal structure for divalent metal chalcogenides, previously only identified for SrS2 and BaTe2. Undoped PbSe2 as well as Bi3+- and Ag+-doped samples (10% Pb substitution) show semi-metallic resistivity down to 0.4 K. Magnetic susceptibility measurement of PbSe 2 shows no magnetic ordering above 1.8 K. The Seebeck coefficients show nearly linear behavior from 35 to 400 K and the largest numerical values are found in the case of undoped PbSe2, + 99 μVK-1, and Bi3+-doped PbSe2, - 146 μVK-1, at the highest temperature measured, 400 K.",

keywords = "Diselenide, High pressure, Lead dichalcogenide, Selenium dimer, X-ray diffraction",

author = "M. Bremholm and Hor, {Y. S.} and Cava, {R. J.}",

note = "Funding Information: The work at Princeton was partially supported by the Princeton Center for Complex Materials , grant DMR 0819860 . MB thanks the Villum Kann Rasmussen foundation for funding.",

year = "2011",

month = jan,

doi = "10.1016/j.solidstatesciences.2010.10.003",

language = "English (US)",

volume = "13",

pages = "38--41",

journal = "Solid State Sciences",

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publisher = "Elsevier Masson s.r.l.",

number = "1",

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T1 - Pressure stabilized Se-Se dimer formation in PbSe2

AU - Bremholm, M.

AU - Hor, Y. S.

AU - Cava, R. J.

N1 - Funding Information: The work at Princeton was partially supported by the Princeton Center for Complex Materials , grant DMR 0819860 . MB thanks the Villum Kann Rasmussen foundation for funding.

PY - 2011/1

Y1 - 2011/1

N2 - The preparation of PbSe2 through the reaction of PbSe with excess Se at 4.5 GPa and 650 °C is reported. The crystal structure, determined from X-ray powder diffraction data (CuAl2 structure type, I4/mcm (#140), a = 6.42695(11) , c = 7.70254(13) , Z = 4), consists of layers of [Se2]2- dimers with Pb2+ in square antiprismatic coordination with Se. This is a rare crystal structure for divalent metal chalcogenides, previously only identified for SrS2 and BaTe2. Undoped PbSe2 as well as Bi3+- and Ag+-doped samples (10% Pb substitution) show semi-metallic resistivity down to 0.4 K. Magnetic susceptibility measurement of PbSe 2 shows no magnetic ordering above 1.8 K. The Seebeck coefficients show nearly linear behavior from 35 to 400 K and the largest numerical values are found in the case of undoped PbSe2, + 99 μVK-1, and Bi3+-doped PbSe2, - 146 μVK-1, at the highest temperature measured, 400 K.

AB - The preparation of PbSe2 through the reaction of PbSe with excess Se at 4.5 GPa and 650 °C is reported. The crystal structure, determined from X-ray powder diffraction data (CuAl2 structure type, I4/mcm (#140), a = 6.42695(11) , c = 7.70254(13) , Z = 4), consists of layers of [Se2]2- dimers with Pb2+ in square antiprismatic coordination with Se. This is a rare crystal structure for divalent metal chalcogenides, previously only identified for SrS2 and BaTe2. Undoped PbSe2 as well as Bi3+- and Ag+-doped samples (10% Pb substitution) show semi-metallic resistivity down to 0.4 K. Magnetic susceptibility measurement of PbSe 2 shows no magnetic ordering above 1.8 K. The Seebeck coefficients show nearly linear behavior from 35 to 400 K and the largest numerical values are found in the case of undoped PbSe2, + 99 μVK-1, and Bi3+-doped PbSe2, - 146 μVK-1, at the highest temperature measured, 400 K.

KW - Diselenide

KW - High pressure

KW - Lead dichalcogenide

KW - Selenium dimer

KW - X-ray diffraction

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