2002 Fiscal Year Final Research Report Summary
Atomic Level Carrier Dynamics of Low-Dimensional Mario-Objects in Momentum-Energy Space
| Project/Area Number |
13450019
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
表面界面物性
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| Research Institution | Tohoku University |
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Principal Investigator |
NAGAO Tadaaki Tohoku University, Institute for Materials Research, Associate Professor, 金属材料研究所, 助教授 (40267456)
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| Co-Investigator(Kenkyū-buntansha) |
SAKURAI Toshio Tohoku University, Institute for Materials Research, Professor, 金属材料研究所, 教授 (20143539)
HASEGAWA Shuji Tokyo University, Department of Physics, Associate Professor, 大学院・理学系研究科, 助教授 (00228446)
INAOKA Takeshi Iwate University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40184709)
FUJIKAWA Yasunori Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (70312642)
SADOWSKI J.t. Tohoku University, Institute for Materials Research, Associate, 金属材料研究所, 助手 (40333885)
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| Project Period (FY) |
2001 – 2002
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| Keywords | plasmon / electron energy loss spectroscopy / silicon / silver / epitaxy / thin film |
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| Research Abstract |
To elucidate the microscopic origin of the macroscopic physical properties of low-dimensional conductive matters, dynamics and interaction in electron systems are studied by measuring the wave vector dependence of the frequency and the lifetime of sheet plasmons. New characterization method with atomic-layer sensitivity utilizing sheet plasmon will be established and applied for searching functional materials that consists of low-dimensional conductive structures. We have studied the charge dynamics in metallic multilayers, monolayers etc. with high carrier density, and have clarified the evolution in the plasmon dispersion curve as a function of thickness, or change in the dimensionality. Two biggest achievements here were the (1) first experimental observations of a sheet plasmon (2D plasmon) in a semiconductor surface-state band. And (2) the observation of a quasi-2D mode at the interface of metallic multilayers on Si. Also, plasmon dispersion in the array of quantum wires have been measured and strong anisotropy has been detected.
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