| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2015: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2014: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Outline of Final Research Achievements |
In this study, we have studied novel quantum orders which are realized in insulators, superconductors, and semimetals. Special focus is made on theoretical studies of “symmetry-protected quantum orders” which are obtained by combining quantum properties like topology of wave functions with symmetry specific to individual systems. In particular, using a mathematical theory of topology called the K-theory, we have completed topological classification of topological crystalline insulators and superconductors in the presence of order-two point group symmetries. This result indicates that much more materials may host symmetry-protected quantum orders than we expected.
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