Magnetism, conductivity, and superconductivity of molecular materials are discussed on the basis of extended Hubbard᎐Peierls Hamiltonians, which involve Ž . Ž . four parameters; transfer integral T , electron-lattice interaction W , and on-site and Ž . intersite Coulomb interactions U, V . The four-
Possibility of charge-mediated superconductors in the intermediate region of metal–insulator transitions
✍ Scribed by Hidemi Nagao; Masaki Mitani; Masamichi Nishino; Yasuteru Shigeta; Yasunori Yoshioka; Kizashi Yamaguchi
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 345 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0020-7608
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✦ Synopsis
Some molecular systems for a charge-mediated superconductor are proposed from the viewpoint of the metallic side and the insulator side. An approach to Ž . the charge-transfer CT model is presented. Expressions of the effective electron᎐electron interaction in the charge-fluctuation models is also derived by a field-theoretical approach.
📜 SIMILAR VOLUMES
It is demonstrated that the upper Hubbard band (UHB) can play an important role in the hopping conductivity; 2D geometry and vicinity of the metal-insulator transition emphasize this role. A simple model for the recently observed metal-insulator transition is suggested. The model starts from the ins