A novel explanation of the phase transition with the valence change in cation-substituted samarium monochalcogenides

K. A. Kikoin; E. G. Goryachev; V. A. Gavrichkov

doi:10.1016/0038-1098(86)90264-4

A novel explanation of the phase transition with the valence change in cation-substituted samarium monochalcogenides

K. A. Kikoin, E. G. Goryachev, V. A. Gavrichkov

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

2 Scopus citations

Abstract

A new interpretation of the dilution-induced phase transition to the mixed valence (MV) state in the systems Sm_1-xMe_xS is proposed. The theory explains the absence of f-electron contribution to the low temperature conductivity of metallic MV phase. The clue point of the model is the proposal to distinguish the intercenter (interband) d.f.-hybridization existing in pure SmS from the intracenter d.f.-hybridization in Sm ions arising only due to the violation of the point crystal symmetry by the guest Me³⁺ ions. The competition of these two mechanisms results in formation of the double-well potential for the f-electrons, whose wave functions are poised between the wells in the MV state.

Original language	English
Pages (from-to)	663-667
Number of pages	5
Journal	Solid State Communications
Volume	60
Issue number	8
DOIs	https://doi.org/10.1016/0038-1098(86)90264-4
State	Published - 1 Jan 1986
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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title = "A novel explanation of the phase transition with the valence change in cation-substituted samarium monochalcogenides",

abstract = "A new interpretation of the dilution-induced phase transition to the mixed valence (MV) state in the systems Sm1-xMexS is proposed. The theory explains the absence of f-electron contribution to the low temperature conductivity of metallic MV phase. The clue point of the model is the proposal to distinguish the intercenter (interband) d.f.-hybridization existing in pure SmS from the intracenter d.f.-hybridization in Sm ions arising only due to the violation of the point crystal symmetry by the guest Me3+ ions. The competition of these two mechanisms results in formation of the double-well potential for the f-electrons, whose wave functions are poised between the wells in the MV state.",

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AU - Kikoin, K. A.

AU - Goryachev, E. G.

AU - Gavrichkov, V. A.

PY - 1986/1/1

Y1 - 1986/1/1

N2 - A new interpretation of the dilution-induced phase transition to the mixed valence (MV) state in the systems Sm1-xMexS is proposed. The theory explains the absence of f-electron contribution to the low temperature conductivity of metallic MV phase. The clue point of the model is the proposal to distinguish the intercenter (interband) d.f.-hybridization existing in pure SmS from the intracenter d.f.-hybridization in Sm ions arising only due to the violation of the point crystal symmetry by the guest Me3+ ions. The competition of these two mechanisms results in formation of the double-well potential for the f-electrons, whose wave functions are poised between the wells in the MV state.

AB - A new interpretation of the dilution-induced phase transition to the mixed valence (MV) state in the systems Sm1-xMexS is proposed. The theory explains the absence of f-electron contribution to the low temperature conductivity of metallic MV phase. The clue point of the model is the proposal to distinguish the intercenter (interband) d.f.-hybridization existing in pure SmS from the intracenter d.f.-hybridization in Sm ions arising only due to the violation of the point crystal symmetry by the guest Me3+ ions. The competition of these two mechanisms results in formation of the double-well potential for the f-electrons, whose wave functions are poised between the wells in the MV state.

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ER -

A novel explanation of the phase transition with the valence change in cation-substituted samarium monochalcogenides

Abstract

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