Sensitive detection of potential fluctuations in semiconductor two-dimensional electron system by spin polarization imaging technique
| Project/Area Number |
24654083
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | Chiba University |
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Principal Investigator |
OTO Kenichi 千葉大学, 理学(系)研究科(研究院), 教授 (30263198)
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| Research Collaborator |
MURO Kiyofumi 千葉大学, 大学院理学研究科, グランドフェロー (90112028)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 半導体 / メゾスコピック / スピンエレクトロニクス / 量子ホール効果 / ２次元電子系 / 電子濃度揺らぎ / 量子井戸 / 2次元電子系 / 電子濃度ゆらぎ |
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| Research Abstract |
We tried to evaluate the electron density fluctuation and the spatial profile in high quality two-dimensional electron systems by means of the magneto-optical Kerr effect at quantum Hall plateau condition. At the quantum Hall plateau, the bare potential fluctuation appears due to the absence of potential screening by electrons. The observation of electron spin polarization at quantum Hall plateau by the Kerr effect microscope is very sensitive to the local electron density, which reveals the true potential fluctuations less than 0.1%. We also confirmed that the mono-atomic layer thickness fluctuation in quantum well can be detected by the magneto-optical Kerr effect (circular dichroic absorption) and is able to map with the electron density fluctuation.
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Report
(3 results)
Research Products
(24 results)
