| Project/Area Number |
11650027
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
表面界面物性
|
|---|
| Research Institution | UNIVERSITY OF TOKYO |
|---|
Principal Investigator |
NAGAO Tadaaki UNIVERSITY OF TOKYO, GRADUATE SCHOOL OF SCIENCE, RESEARCH ASSOCIATE, 大学院・理学系研究科, 助手 (40267456)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Shiji UNIVERSITY OF TOKYO GRADUATE SCHOOL OF SCIENCE, ASSOCIATE PROFESSOR, 大学院・理学系研究科, 助教授 (00228446)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Project Status |
Completed (Fiscal Year 2000)
|
| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥3,100,000 (Direct Cost: ¥3,100,000)
|
|---|
| Keywords | HREELS / DIFFRACTION / PHONON / PLASMON / ELECTRON / PHASE TRANSITION / EEENERGY DISPERSION / MBE / シリコン / 回子回析 / 表面 / 電子エネルギー損失分光 |
|---|
| Research Abstract |
Angle-resolved high-resolution electron energy loss spectroscopy (HREELS) has been widely applied for the study of energy dispersion curves of surface phonons and surface plasmons. However, wide acceptance angles and the limited angular scanning in a 1 dimensional manner in conventional high-resolution electron energy loss spectrometers has been hindering the detailed studies of phonon anomalies during phase transitions as well as low-dimensional plasmon modes (sheet plasmons, wire plasmons). Also, in situ studies of surface phase transitions during temperature change or during molecular beam epitaxy (MBE) are difficult using the electron beams of conventional HREELS.Here in this project, we have developed a new version of an electron energy loss spectrometer which is capable of measuring high-resolution EELspectra as well as high-resolution diffraction by use of monochromatised slow electron beams during MBE and sample heating [reference 1]. Comprehensive study of phase transition will be performed by correlating possible phonon anomalies with the spot profile/intensity analyses of the diffraction patterns. Also, energy dispersion curves of low-dimensional plasmon modes, which are impossible to measure with conventional spectrometers, can be studied by utilizing its high momentum resolution [reference 2].
|
