Quantum many-body state due to nonmagnetic degrees of freedom
| Project/Area Number |
23740258
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 強相関系 / 四極子 / 四極子秩序 / 朝永ラッティンジャー液体 / モンテカルロ法 / スピン波 / 超伝導 / マグノン / 強相関電子系 / フラストレーション / 近藤効果 |
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| 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.
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Report
(5 results)
Research Products
(18 results)
