2013 Fiscal Year Final Research Report
Phase of matter by geometrical phases: application for quantum liquids and graphene
| Project/Area Number |
23340112
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
AOKI Hideo 東京大学, 大学院・理学系研究科, 教授 (50114351)
SHIMANO Ryo 東京大学, 大学院・理学系研究科, 准教授 (40262042)
KAWARABAYASHI Tohru 東邦大学, 理学部, 教授 (90251488)
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| Co-Investigator(Renkei-kenkyūsha) |
MARUYAMA Isao 福岡工業大学, 情報工学部, 准教授 (20422339)
OKA Takashi 東京大学, 大学院・工学系研究科, 講師 (50421847)
HAMAMOTO Yuji 筑波大学, 数理物質系, 助教 (30584734)
KARIYADO Toshikaze 筑波大学, 数理物質系, 助教 (60711281)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 量子液体 / グラフェン / ベリー接続 / テラヘルツ分光 / ファラデー回転 |
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| Research Abstract |
Graphene is a typical quantum material where quantum interference plays an important role. Especially at the zero energy Landau level in a strong magnetic field, the chiral symmetry, which is a characteristic feature of graphene, is fundamental. However most of the theories do not include manybody effects until now. Here in this project, we have constructed a theory of the chiral condensate which is a manybody ground state of graphene with interaction. Then comparison of excitation gap with experiments is performed consistently. It implies validities of our theory. Also we have clarified the role of randomness with chiral symmetry.
Also Faraday rotation experiments with theoretical consideration has been performed. Then optical quantum Hall effects of graphene is successfully observed and established.
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