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DOI | 10.1126/science.aan5351 |
Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions | |
Hirata, Michihiro1,2; Ishilowa, Kyohei2; Matsuno, Geoid3; Kobayashi, Aldto3; Miyagawa, Kazuya2; Tamura, Masafumi4; Berthier, Claude5,6; Kanoda, Kazushi2 | |
2017-12-15 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 358期号:6369页码:1403-1406 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; France |
英文摘要 | The Coulomb interaction in systems of quasi-relativistic massless electrons has an unscreened long-range component at variance with conventional correlated metals. We used nuclear magnetic resonance (NMR) measurements to reveal unusual spin correlations of two-dimensional Weyl fermions in an organic material, causing a divergent increase of the Korringa ratio by a factor of 1000 upon cooling, in marked contrast to conventional metallic behavior. Combined with model calculations, we show that this divergence stems from an interaction-driven velocity renormalization that almost exclusively suppresses zero-momentum spin fluctuations. At low temperatures, the NMR relaxation rate shows an unexpected increase; numerical analyses show that this increase corresponds to internode excitonic fluctuations, a precursor to a transition from massless to massive quasiparticles. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417918500034 |
WOS关键词 | ELECTRON-ELECTRON INTERACTIONS ; STATE ; ALPHA-(BEDT-TTF)(2)I-3 ; RELAXATION ; PRESSURE ; GRAPHENE ; METALS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/197564 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan; 2.Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan; 3.Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan; 4.Tokyo Univ Sci, Fac Sci & Technol, Dept Phys, Noda, Chiba 2788510, Japan; 5.UPS, UGA, EMFL, LNCMI CNRS UPR3228,Lab Natl Champs Magnet Intense, Boite Postale 166, F-38042 Grenoble 9, France; 6.INSA, Boite Postale 166, F-38042 Grenoble 9, France |
推荐引用方式 GB/T 7714 | Hirata, Michihiro,Ishilowa, Kyohei,Matsuno, Geoid,et al. Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions[J]. SCIENCE,2017,358(6369):1403-1406. |
APA | Hirata, Michihiro.,Ishilowa, Kyohei.,Matsuno, Geoid.,Kobayashi, Aldto.,Miyagawa, Kazuya.,...&Kanoda, Kazushi.(2017).Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions.SCIENCE,358(6369),1403-1406. |
MLA | Hirata, Michihiro,et al."Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions".SCIENCE 358.6369(2017):1403-1406. |
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