Quantum criticality via Berry Phase effects
| Project/Area Number |
20540383
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | National Institute for Materials Science |
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Principal Investigator |
TANAKA Akihiro National Institute for Materials Science, 環境・エネルギー材料萌芽ラボ, 主幹研究員 (10354143)
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| Co-Investigator(Kenkyū-buntansha) |
KOHNO MASANORI 独立行政法人物質・材料研究機構, ナノアーキテクトニクス研究拠点, MANA研究者 (40370308)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ベリー位相 / 量子相転移 / 量子位相干渉 / 量子スピン系 / トポロジカル絶縁体 / フローケの方法 / 捩率 / リーマン・カルタン時空 / 量子スピンホール効果 / 量子熱ホール効果 / チャーン・サイモンズ項 / 重力量子異常 / バレー量子ホール効果 / ベリー位相効果 / 分数量子化 / トポロジカル秩序 / スピン液体 / ゲージ対称性 / グラフェン由来物質 / 量子ホール効果 / スピン量子ホール効果 |
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| Research Abstract |
When Berry phase terms enter the low energy effective theory of a many body system, the quantum interference that it induces can alter completely the various statistical mechanical properties. Of special interest is the change in the quantum critical behavior that such terms can be bring about. We have made detailed analysis on the latter aspect for several sytems, among which are antiferromagnets in an applied magnetic field, and topological insulators.
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Report
(4 results)
Research Products
(57 results)
