Charge transfer degree and superconductivity of the incommensurate organic superconductor (MDT-TSF)(I3)0.422

この論文にアクセスする

この論文をさがす

抄録

The influence of a small change of carrier number on the superconducting transition temperature Tc in the incommensurate organic superconductors is investigated for (MDT-TSF) (I3) 0.422 (MDT-TSF: methylenedithio- tetraselenafulvalene, Tc =4.9 K) in comparison with (MDT-TSF) (AuI2) 0.436 (Tc =4.5 K). Careful estimation of the degree of charge transfer by means of the Raman spectra as well as the Shubnikov–de Haas (SdH) oscillations indicates that the charge-transfer degree 0.422 for the I3 salt is obviously smaller than 0.436 in the AuI2 salt. According to the band calculation, the former salt has smaller density of states. However, the former salt exhibits higher Tc than the latter compounds, and this disagrees with the naive prediction of the BCS theory. The former salt shows considerably large effective cyclotron mass extracted from the SdH oscillations. These observations demonstrate that the strength of the many-body effect is the major factor that determines Tc in these organic superconductors.

収録刊行物

  • Physical Review B - Condensed Matter and Materials Physics

    Physical Review B - Condensed Matter and Materials Physics 73(9), 094513-1-094513-8, 2006-03-24

    American Physical Society

各種コード

  • NII論文ID(NAID)
    120000879822
  • NII書誌ID(NCID)
    AA00362255
  • 本文言語コード
    ENG
  • 資料種別
    journal article
  • ISSN
    0163-1829
  • データ提供元
    IR 
ページトップへ