- 著者
- Ishida Masahiko Takeuchi Osamu Mori Takehiko Shigekawa Hidemi
- 出版者
- American Physical Society
- 雑誌
- Physical review B (ISSN:01631829)
- 巻号頁・発行日
- vol.64, no.15, pp.153405, 2001-09
- 被引用文献数
- 9 10
In addition to the intermolecular symmetry breaking which is generally observed during the surface relaxation/reconstruction of atomic crystals, intramolecular relaxation is expected to exist in the case of molecular crystals, which was confirmed on the surface of β-(BEDT-TTF)2PF6 [BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene] by using scanning tunneling microscopy (STM). Two types of molecular images obtained by STM were comprehensively explained by the spatial distributions of the highest-occupied molecular orbital calculated for the two types of the molecular structures. One is the structure appearing in the crystal that is derived from the x-ray diffraction measurement, which was used in the previous calculations to reproduce the STM images. The other is the relaxed molecular structure calculated by optimization of the molecular structure.
- 著者
- Kawamoto Tadashi Mori Takehiko Takimiya Kazuo Kataoka Yoshiro Aso Yoshio Otsubo Tetsuo
- 出版者
- American Physical Society
- 雑誌
- Physical Review B - Condensed Matter and Materials Physics (ISSN:01631829)
- 巻号頁・発行日
- vol.65, no.14, pp.140508-1-140508-4, 2002-03-28
- 被引用文献数
- 7 42
The degree of charge transfer and the upper critical field of the organic superconductor (MDT-TSF)(AuI2)x have been investigated (MDT-TSF: methylenedithio-tetraselenafulvalene). The x-ray oscillation photograph indicates that the anion lattice is incommensurate with the donor lattice, and the chemical composition is (MDT-TSF)(AuI2)0.44 . The charge-transfer degree of this salt is 0.44. The electrical resistivity and the Seebeck coefficient indicate that this salt is a good Fermi liquid above the superconducting transition temperature. The upper critical fields show anisotropic three-dimensional character in spite of the complicated incommensurate structure, and are within the Clogston-Chandrasekhar paramagnetic limit in all directions.