2014 Fiscal Year Final Research Report
Quantum many-body state due to nonmagnetic degrees of freedom
| Project/Area Number |
23740258
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2011-04-28 – 2015-03-31
|
| Keywords | 強相関系 / 四極子 |
|---|
| Outline of Final Research Achievements |
Magnetic degrees of freedom have played a main role in our modern technology for many years. Recently, there appeared a considerable interest on non-magnetic degrees of freedom inherent in the nature of electrons. In this study, we have discussed various properties arising from such nonmagnetic degrees of freedom: "Chirality" formed by several spins turns out to be a main player in Kondo problem in tetrahedron spin configuration. "Quadrupole" moments that is anisotropic charge distributions of electrons, give a new opportunity of critical phenomena related to so called XY universality class. We have also developed a new Monte Carlo algorithm for one-dimensional systems and a theory for certain class of superconductivity. We expect that these results becomes the fundamentals for future studies in this field.
|
| Free Research Field |
強相関電子系
|
