| Project/Area Number |
17540352
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Mathematical physics/Fundamental condensed matter physics
|
|---|
| Research Institution | Niigata University |
|---|
Principal Investigator |
GODA Masaki Niigata University, Institute of Science and Technology, Professor (60018835)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
NISHINO Shinya Hokkaido University, Graduate School of Engineering, COE Research Fellow (50431325)
|
|---|
| Project Period (FY) |
2005 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥1,200,000 (Direct Cost: ¥1,200,000)
|
|---|
| Keywords | Flat-Band / New Constructive Method of Flat-Band / Anderson Transition / Inverse Anderson Transition / Lattice Dynamics of Phonons with Flat-Band / Ideal Deformable Solids / Acoustic Phonons with Parabolic Dispersion Relation / Insulator of Acoustic Phonons |
|---|
| Research Abstract |
(1) IPR analysis and f(α) analysis of peculiar electronic states in a random system made from triply-degenerated orbits on honeycomb lattice wit flat-band.
We found the details of the peculiar states and found that they do not depend on the strength of disorder when we decrease it toward zero.
(2) Anomalous properties of acoustic phonons in 1-and 2-dimensional disordered systems made from anomalous solids with parabolic Frequency-wavenumber dispersion relations.
We found a strong localization of the acoustic phonons in a low-frequency region in the ea CPS of 1- and 2-dimensions.
The strong localization of sound wave comes from the vanishing of the group velocity of the original periodic systems.
|
