WEKO3
アイテム
Origin of Quantum Criticality in Yb-Al-Au Approximant Crystal and Quasicrystal
http://hdl.handle.net/10228/00006637
http://hdl.handle.net/10228/00006637f9e207a4-e134-4b2b-a247-7b1ddcd047fa
| 名前 / ファイル | ライセンス | アクション |
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scunit-2017_16.pdf (1.2 MB)
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| アイテムタイプ | 学術雑誌論文 = Journal Article(1) | |||||||||||||
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| 公開日 | 2018-03-06 | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | journal article | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Origin of Quantum Criticality in Yb-Al-Au Approximant Crystal and Quasicrystal | |||||||||||||
| 言語 | en | |||||||||||||
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| 言語 | eng | |||||||||||||
| 著者 |
渡辺, 真仁
× 渡辺, 真仁
WEKO
21148
× Miyake, Kazumasa |
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | To get insight into the mechanism of emergence of unconventional quantum criticality observed in quasicrystal Yb15Al34Au51, the approximant crystal Yb14Al35Au51 is analyzed theoretically. By constructing a minimal model for the approximant crystal, the heavy quasiparticle band is shown to emerge near the Fermi level because of strong correlation of 4f electrons at Yb. We find that charge-transfer mode between 4f electron at Yb on the 3rd shell and 3p electron at Al on the 4th shell in Tsai-type cluster is considerably enhanced with almost flat momentum dependence. The mode-coupling theory shows that magnetic as well as valence susceptibility exhibits χ ∼ T−0.5 for zero-field limit and is expressed as a single scaling function of the ratio of temperature to magnetic field T/B over four decades even in the approximant crystal when some condition is satisfied by varying parameters, e.g., by applying pressure. The key origin is clarified to be due to strong locality of the critical Yb-valence fluctuation and small Brillouin zone reflecting the large unit cell, giving rise to the extremely-small characteristic energy scale. This also gives a natural explanation for the quantum criticality in the quasicrystal corresponding to the infinite limit of the unit-cell size. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Journal of the Physical Society of Japan 巻 85, 号 6, p. 063703, 発行日 2016-03-17 |
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| 出版社 | ||||||||||||||
| 出版者 | 日本物理学会 | |||||||||||||
| 言語 | ja | |||||||||||||
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| 関連タイプ | isVersionOf | |||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.7566/JPSJ.85.063703 | |||||||||||||
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| 関連タイプ | isVersionOf | |||||||||||||
| 識別子タイプ | URI | |||||||||||||
| 関連識別子 | https://cir.nii.ac.jp/crid/1050282813888646400 | |||||||||||||
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| 収録物識別子タイプ | NCID | |||||||||||||
| 収録物識別子 | AA00704814 | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||||
| 収録物識別子 | 0031-9015 | |||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||
| 収録物識別子 | 1347-4073 | |||||||||||||
| 著作権関連情報 | ||||||||||||||
| 権利情報 | Copyright (c) 2016 The Physical Society of Japan | |||||||||||||
| 出版タイプ | ||||||||||||||
| 出版タイプ | AM | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||
| 査読の有無 | ||||||||||||||
| 値 | yes | |||||||||||||
| 連携ID | ||||||||||||||
| 値 | 6435 | |||||||||||||
