Temperature Dependence of the Reflectance Spectra of the Single Crystals of Bis(ethylenedithio)tetrathiafulvalenium Salts. α-(BEDT–TTF)3(ReO4)2 and α-(BEDT–TTF)2I3

Polarized reflectance spectra were measured on the single crystals of α-(BEDT–TTF)3(ReO4)2 and α-(BEDT–TTF)2I3. The optical spectra of these materials were interpreted on the basis of a simple semimetallic band model, and the anisotropic character of the intermolecular interaction in these crystals was quantitatively examined by analyzing the observed spectra. The observed temperature dependence of reflectance spectrum reflects the change of the electronic structure accompanying the metal-insulator phase transition, and is consistent with our interpretation of the spectra.

[1]  Y. Nogami,et al.  X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3 , 1986 .

[2]  R. Bozio,et al.  Electron-molecular vibration coupling in 2-D organic conductors : high and low temperature phases of α-(BEDT-TTF)2I3 , 1986 .

[3]  Kinoshita,et al.  Conduction-electron-spin resonance in organic conductors: alpha and beta phases of di , 1986, Physical review. B, Condensed matter.

[4]  H. Kuroda,et al.  Temperature dependence of the reflectance spectrum of β-(BEDT-TTF)2I3 , 1986 .

[5]  K. Kikuchi,et al.  Structure and Optical Spectrum of (TMTTF)2IO4. The Role of Coulomb Interaction , 1986 .

[6]  H. Kuroda,et al.  Polarized reflectance spectrum of β-(BEDT-TTF)2I3 single crystal , 1985 .

[7]  H. Kuroda,et al.  Polarized reflectance spectrum of β-(BEDT-TTF)2PF6 , 1985 .

[8]  Hsien‐Hau Wang,et al.  ESR study of two phases of di[bis(ethylenedithio)tetrathiafulvalene]triiodide [(BEDT-TTF ) 2 I 3 ] , 1985 .

[9]  Eklund,et al.  Optical reflectance study of the electronic structure of acceptor-type graphite intercalation compounds. , 1985, Physical review. B, Condensed matter.

[10]  C. S. Jacobsen,et al.  Infrared properties of the ambient pressure organic superconductor (BEDT-TTF)2I3 , 1985 .

[11]  M. Tokumoto,et al.  Superconductivity with the Onset at 8 K in the Organic Conductor β-(BEDT–TTF) 2 I 3 under Pressure , 1985 .

[12]  H. Kuroda,et al.  Reflectance Spectra of Bedt-Ttf salts , 1985 .

[13]  S. Parkin,et al.  The Many Faces of ET , 1985 .

[14]  F. Behroozi,et al.  Ambient-pressure superconductivity at 2.7 K and higher temperatures in derivatives of (BEDT-TTF)2IBr2: synthesis, structure, and detection of superconductivity , 1984 .

[15]  C. S. Jacobsen,et al.  Organic conductors: evidence for correlation effects in infrared properties , 1984 .

[16]  J. C. Scott,et al.  Comparative ESR study of three (BEDT-TTF): ReO4 salts: An organic superconductor, a peierls metal and a semiconductor , 1984 .

[17]  Takehiko Mori,et al.  Crystal Structures and Electrical Properties of BEDT-TTF Coeipounds , 1984 .

[18]  H. Schäfer,et al.  (BEDT-TTF)+ 2J- 3: A Two-Dimensional Organic Metal , 1984 .

[19]  H. Kuroda,et al.  The polarized reflectance spectrum of a novel organic conductor (BEDT-TTF)2ClO4(C2H3Cl3)0.5 , 1984 .

[20]  C. S. Jacobsen,et al.  Optical and infrared properties of tetramethyltetraselenafulvalene [(TMTSF)2X] and tetramethyltetrathiafulvalene [(TMTTF)2X] compounds , 1983 .

[21]  T. Enoki,et al.  Two-dimensionality and suppression of metal-semiconductor transition in a new organic metal with alkylthio substituted TTF and perchlorate , 1982 .

[22]  H. Kuroda,et al.  Temperature Dependence of the Reflectance Spectra of Highly-Conductive TTF Salts , 1982 .