| Project/Area Number |
18560314
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Nihon University |
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Principal Investigator |
YAMAMOTO Hiroshi Nihon University, College of Sci. & Technol., Professor (90130632)
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| Co-Investigator(Kenkyū-buntansha) |
IWATA Nobuyuki Nihon University, College of Sci. & Technol., Lecturer (20328686)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,910,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥510,000)
Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2006: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Room Temperature Superconductor / Nanostructure / Exciton / Tela Hz / Ultrathin Interface |
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| Research Abstract |
Little and Ginzburg propose low dimensional transport systems by excitons as a model of a room temperature superconductivity. In the models, the candidate of conductive layer (the main chain) for the 2-dimensional system is a metal. Since the shielding length of the exciton in metals may be in the order of nm, the metal layer must be ultrathin and continuous. The dielectric layer (the side chain) must have enough high energy and interactions with electrons.
We have studied the electrical conduction properties of the self-assembly monolayer of the C_<60>-O-C_8SH derivatives (C_<60>-SAM) (as dielectric layer) on Au ultrathin films (as conductive layer) as the model materials for an excitonic superconductor. When using the metal mask, electrodes were made by RF magnetron sputtering, sputtered Au atoms passed around behind the holes of the mask. After removing the mask Au ultrathin films were deposited by RF magnetron sputtering. The specimen was soaked in a 0.01mM benzene solution of C_<60> derivatives for 20 h at room temperature. The resistance decreased linearly from room temperature to 125K, and the gradient became steep lower than 125K. The unusual conductive behavior was observed only in the specimen which has an electrode distance less than 10 μm.
We concluded that the above anomalous transport properties may be caused by the influence of excitonic interactions between free electrons in the metal and electric dipoles excited in the molecules.
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