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Optical studies of the quasi one-dimensional charge-density-wave state in [Pt(en)2][Pt(en)2Cl2](ClO4)4 (en=ethylenediamine) under hydrostatic pressure
http://hdl.handle.net/2298/9613
http://hdl.handle.net/2298/9613ac07690d-5e90-4420-9b8b-1e97e3599c1d
名前 / ファイル | ライセンス | アクション |
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PRB_040_3066.pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2008-10-23 | |||||
タイトル | ||||||
タイトル | Optical studies of the quasi one-dimensional charge-density-wave state in [Pt(en)2][Pt(en)2Cl2](ClO4)4 (en=ethylenediamine) under hydrostatic pressure | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | PtCl complex, 白金錯体, quasi one-dimensional, 擬一次元, soliton, ソリトン, midgap absorption, ミッドギャップ吸収, Raman scattering, ラマン散乱, photoinduced absorption, 光誘起吸収, hydrostatic pressure, 静水圧 | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
著者 |
酒井, 政道
× 酒井, 政道× Kuroda, Noritaka× 仁科, 雄一郎 |
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別言語の著者 |
酒井, 政道
× 酒井, 政道× 黒田, 規敬× 仁科, 雄一郎 |
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内容記述 | ||||||
内容記述 | We have measured optical absorption, photoinduced absorption, and Raman scattering in the quasi-one-dimensional mixed-valence complex [Pt(en)2][Pt(en)2Cl2](Cl04)4 (where ‘‘en’’ is an abbreviation for ‘‘ethylenediamine’’), under hydrostatic pressure up to 3 GPa at temperatures in the range 110–300 K. Analyzing the results by use of the Morse potential, we have evaluated the Peierls gap Eg, the electron-phonon coupling constant β, the Peierls distortion of Cl ions, u, and the supertransfer energy t0: Eg=3.0 eV, β=1.94 eV/Å, and t0=0.52 eV at atmospheric pressure; Eg, β, and ‖u‖ decrease with increasing pressure because t0 is enhanced significantly by the contraction of the Pt-Pt & electrons of Pt ions are delocalized. It has been established that the intragap absorption which is enhanced by pressure and photoexcitation arises from the soliton-to-band transitions mediated by neutral solitons with a coherence length of only one Pt-Pt distance: The absorption band exhibits two peaks, A and B, at 1.68 and 2.0 eV, corresponding to the van Hove singularities of quasi-one-dimensional conduction and valence bands. Such a small coherence length of the soliton is crucial for an understanding of this novel double-peak spectrum. | |||||
内容記述 | ||||||
内容記述 | 最大3 GPaまでの静水圧下でハロゲン架橋擬一次元白金錯体[Pt(en)2][Pt(en)2Cl2](ClO4)4のギャップ間遷移光吸収、レーザ誘起光吸収およびラマン散乱を測定した。1つの理論ポテンシャルを導入してデータを解析し、パイエルスギャップ、パイエルス変位、電子・音子結合定数および移動積分の圧力依存性を評価した。これらの結果は、レーザ誘起ミッドギャップバンドが最近接白金原子間距離の程度のサイズを持った中性ソリトンに起因するという考え方を支持する。このミッドギャップバンドが見かけ上2つのピークから成ることも擬一次元半導体特有の価電子帯と伝導帯の分散で理解できることを指摘した。 | |||||
書誌情報 |
Physical Review B 巻 40, 号 5, p. 3066-3076, 発行年 1989-08-15 |
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ISSN | ||||||
収録物識別子 | 01631829 | |||||
書誌レコードID | ||||||
収録物識別子 | AA00362255 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
関連識別子 | 10.1103/PhysRevB.40.3066 | |||||
権利 | ||||||
権利情報 | ©1989 The American Physical Society | |||||
フォーマット | ||||||
内容記述 | application/pdf | |||||
形態 | ||||||
1146343 bytes | ||||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
日本十進分類法 | ||||||
主題 | 431.5 | |||||
その他の言語のタイトル | ||||||
その他のタイトル | 静水圧下の[Pt(en)2][Pt(en)2Cl2](ClO4)4の擬一次元電荷密度波の光学的研究 | |||||
タイトル(ヨミ) | ||||||
その他のタイトル | セイスイアツ カ ノ [Pt(en)2] [Pt(en)2Cl2] (ClO4)4 ノ ギ イチジゲン デンカ ミツドハ ノ コウガクテキ ケンキュウ | |||||
出版者 | ||||||
出版者 | The American Physical Society | |||||
資源タイプ | ||||||
内容記述 | 論文(Article) | |||||
資源タイプ・ローカル | ||||||
雑誌掲載論文 | ||||||
資源タイプ・NII | ||||||
Journal Article | ||||||
資源タイプ・DCMI | ||||||
text | ||||||
資源タイプ・ローカル表示コード | ||||||
01 | ||||||
URL | ||||||
内容記述 | http://link.aps.org/abstract/PRB/v40/p3066 | |||||
コメント | ||||||
黒田規敬: 熊本大学大学院自然科学研究科マテリアル工学講座・工学部マテリアル工学科 |