Infrared and Raman study of the charge-ordered state in the vicinity of the superconducting state in the organic conductor β-(meso-DMBEDT-TTF)2PF6

• Tanaka Masayuki

  Institute for Molecular Science and Graduate University for Advanced Studies

• Yamamoto Kaoru

  Institute for Molecular Science and Graduate University for Advanced Studies

• Uruichi Mikio

  Institute for Molecular Science and Graduate University for Advanced Studies

• Yamamoto Takashi

  Institute for Molecular Science and Graduate University for Advanced Studies

• Yakushi Kyuya

  Institute for Molecular Science and Graduate University for Advanced Studies

• Kimura Shinya

  Institute for Solid State Physics, The University of Tokyo

• Mori Hatsumi

  Institute for Solid State Physics, The University of Tokyo CREST, JST

書誌事項

タイトル別名

• Infrared and Raman Study of the Charge-Ordered State in the Vicinity of the Superconducting State in the Organic Conductor β-(<I>meso</I>-DMBEDT-TTF)<SUB>2</SUB>PF<SUB>6</SUB>
• Infrared and Raman study of the charge ordered state in the vicinity of the superconducting state in the organic conductor v meso DMBEDT TTF 2PF6

抄録

We present spectroscopic evidence for charge ordering in β-(meso-DMBEDT-TTF)₂PF₆ below ∼70 K. Its infrared and Raman spectra change abruptly at ∼70 K. The amplitude of the charge order was estimated to be 0.5 from the splitting of the infrared-active C=C stretching mode. The coexistence of both high-temperature and low-temperature signals was observed in a narrow temperature range (∼4 K) near the phase transition temperature. The pressure and temperature phase diagram was obtained in the vicinity of the superconducting phase. The checkerboard-type charge-order phase is not directly adjacent to the superconducting phase, but the superconducting phase is adjacent to the insulating phase where the short-range ordered domain of charge order is growing. The coexistent region expands significantly when hydrostatic pressure is applied. In the coexistent region, the crystal is inhomogeneous not just on a macroscopic scale, but also on a mesoscopic scale.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (2), 024714-024714, 2008

  一般社団法人 日本物理学会

キーワード

• organic conductor
• β-(<I>meso</I>-DMBEDT-TTF)<SUB>2</SUB>PF<SUB>6</SUB>
• charge order
• superconductivity
• high pressure
• charge fluctuation

詳細情報

• CRID: 1390001204198388096
• NII論文ID: 130005436378
• NII論文ID: 110006613905
• NII論文ID: 210000107112
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.024714
• BIBCODE: 2008JPSJ...77b4714T
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9377942
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9377942
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.024714
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可