2014 Fiscal Year Final Research Report
Research on the electronic nematic phases in strongly correlated electron systems
| Project/Area Number |
24244057
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo (2014)
Kyoto University (2012-2013) |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 対称性の破れ / 隠れた秩序 / 電子相関 / 重い電子系 / 鉄系超伝導 / 構造解析 / サイクロトロン共鳴 / 磁気トルク |
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| Outline of Final Research Achievements |
In this project, we have studied the so-called "electronic nematic" states in strongly correlated electron systems such as iron-based superconductors and heavy-fermion materials, by using several new experimental techniques. One of the most important achievements is that we identified broken fourfold rotational symmetry in the hidden-order phase in a uranium-based compound, whose nature has been a long-standing mystery in condensed matter physics. This conclusion has been consistently obtained from a variety of measurements including magnetic anisotropy measurements by using sensitive torque magnetometry, high-resolution crystal structure analysis by using synchrotron X-ray, angular dependence of the effective mass by cyclotron resonance, and nematic susceptibility analysis from elastoresistance measurements by using piezoelectric devices.
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| Free Research Field |
固体電子物性
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