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DOI | 10.1126/science.aao2934 |
The role of electron-electron interactions in two-dimensional Dirac fermions | |
Tang, Ho-Kin1,2; Leaw, J. N.1,2; Rodrigues, J. N. B.1,2; Herbut, I. F.3; Sengupta, P.1,4; Assaad, F. F.5; Adam, S.1,2,6 | |
2018-08-10 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 361期号:6402页码:570-574 |
文章类型 | Article |
语种 | 英语 |
国家 | Singapore; Canada; Germany |
英文摘要 | The role of electron-electron interactions in two-dimensional Dirac fermion systems remains enigmatic. Using a combination of nonperturbative numerical and analytical techniques that incorporate both the contact and long-range parts of the Coulomb interaction, we identify the two previously discussed regimes: a Gross-Neveu transition to a strongly correlated Mott insulator and a semimetallic state with a logarithmically diverging Fermi velocity accurately described by the random phase approximation. We predict that experimental realizations of Dirac fermions span this crossover and that this determines whether the Fermi velocity is increased or decreased by interactions. We explain several long-standing mysteries, including why the observed Fermi velocity in graphene is consistently about 20% larger than values obtained from ab initio calculations and why graphene on different substrates shows different behaviors. |
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:000441202700029 |
WOS关键词 | LIQUID BEHAVIOR ; GRAPHENE ; SPECTROSCOPY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/199339 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Natl Univ Singapore, Ctr Adv Mat 2D, 6 Sci Dr 2, Singapore 117546, Singapore; 2.Natl Univ Singapore, Dept Phys, Fac Sci, 2 Sci Dr 3, Singapore 117542, Singapore; 3.Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada; 4.Nanyang Technol Univ, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore; 5.Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany; 6.Yale NUS Coll, 16 Coll Ave West, Singapore 138527, Singapore |
推荐引用方式 GB/T 7714 | Tang, Ho-Kin,Leaw, J. N.,Rodrigues, J. N. B.,et al. The role of electron-electron interactions in two-dimensional Dirac fermions[J]. SCIENCE,2018,361(6402):570-574. |
APA | Tang, Ho-Kin.,Leaw, J. N..,Rodrigues, J. N. B..,Herbut, I. F..,Sengupta, P..,...&Adam, S..(2018).The role of electron-electron interactions in two-dimensional Dirac fermions.SCIENCE,361(6402),570-574. |
MLA | Tang, Ho-Kin,et al."The role of electron-electron interactions in two-dimensional Dirac fermions".SCIENCE 361.6402(2018):570-574. |
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