Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>α</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mtext>BEDT-TTF</mml:mtext></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>I</mml:mtext><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
書誌事項
- タイトル別名
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- Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α-(BEDT-TTF)2I3
- Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α−(BEDT-TTF)2I3
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説明
We present the site-charge distribution in the charge-ordered and metallic states of α-(BEDT-TTF)2I3, based on the assignment of the C=C stretching modes ν2, ν3, and ν27 of α-(BEDT-TTF)2I3 with the aid of 13C- and deuterium-substituted compounds. The nonuniform site charges in both the metallic and insulating phases were consistent with those determined by a recent x-ray diffraction study. Comparing the line shapes of the charge-sensitive vibrational modes of α-(BEDT-TTF)2I3 with those of isostructural α-(BEDT-TTF)2NH4Hg(SCN)4, we propose a thermally activated fluctuation of charge order in the metallic phase of α-(BEDT-TTF)2I3. This fluctuation was considerably suppressed above 0.65 GPa. The optical conductivity in the metallic phase shows no Drude response.
収録刊行物
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- Physical Review B
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Physical Review B 82 (7), 075134-, 2010-08-15
American Physical Society
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詳細情報 詳細情報について
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- CRID
- 1050282813983675776
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- NII論文ID
- 120002386833
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- ISSN
- 1550235X
- 10980121
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- HANDLE
- 2115/43848
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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