2013 Fiscal Year Final Research Report
Theoretical study of origin of Dirac particle and Berry phase in organic conductor
| Project/Area Number |
23540403
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Nagoya University |
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Principal Investigator |
SUZUMURA Yoshikazu 名古屋大学, 理学(系)研究科(研究院), 名誉教授 (90108449)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ディラック電子 / 有機導体 / ディラック・コーン / ベリー位相 / ゼロギャップ |
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| Research Abstract |
In organic conductor, electrons move in the crystal consisting of molecules where the metallic and insulating states are realized depending on the property of the energy band. Among them, zero-gap state in which electron behaves as the relativistic particle, has been found in an organic conductor. We examined such electron with an exotic band energy of Dirac cone using the quantum mechanics. We found that the phase (Berry phase) takes an important role to understand such topological property of Dirac electron. The origin has been studied in terms of the symmetry of the crystal and transfer energies which enable electrons to move between molecules. The property of Dirac cone has been elucidated through the close collaboration between experiment and theory.
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