| Project/Area Number |
26400343
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Muroran Institute of Technology |
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Principal Investigator |
MOMONO Naoki 室蘭工業大学, 工学研究科, 教授 (00261280)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 銅酸化物高温超伝導体 / 走査トンネル顕微鏡 / ストライプオーダー / 電子ネマティック状態 / 電荷秩序 / 高温超伝導体 / 擬ギャップ / ネマティシティ / 酸化物高温超伝導体 / 走査トンネル分光 |
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| Outline of Final Research Achievements |
In STM experiments on Fe-doped Bi2212, two kinds of 2-dimensional(2D) modulation were observed in STM images; one shows 5a by 5a modulation and the other shows 4a by 4a modulation, where a is lattice constant within Cu-O layer. The latter can be ascribed to the pinning due to Fe impurities. In Dy-doped Bi2212, the superconducting transition temperature Tc is largely suppressed around the hole concentration p=1/8. The 2D modulation of the STM image for p=1/8 shows 3.3a by 3.3a period. It will be difficult to explain these periodicities of the 2D modulations by some kind of the Fermi surface nesting. In Dy-doped Bi2212, the 4-fold rotational symmetry of the 2D modulation in STM images is broken regardless of the STM tip and scanning direction, indicating that the 2D modulation for p=1/8 is consistent with some kind of the nematic states of the electrons.
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