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题名: Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice
作者: Singha, A ;  Gibertini, M ;  Karmakar, B ;  Yuan, S ;  Polini, M ;  Vignale, G ;  Katsnelson, MI ;  Pinczuk, A ;  Pfeiffer, LN ;  West, KW ;  Pellegrini, V
刊名: SCIENCE
出版日期: 2011
卷号: 332, 期号:6034, 页码:1176-1179
关键词: MEAN-FIELD THEORY ;  DIRAC FERMIONS ;  GAS ;  GRAPHENE ;  PHYSICS
学科分类: Physics
通讯作者: Pellegrini, V (reprint author), CNR, Ist Nanosci, I-56126 Pisa, Italy.
部门归属: [Singha, A.; Gibertini, M.; Karmakar, B.; Polini, M.; Pellegrini, V.] CNR, Ist Nanosci, I-56126 Pisa, Italy; [Singha, A.; Gibertini, M.; Karmakar, B.; Polini, M.; Pellegrini, V.] Scuola Normale Super Pisa, I-56126 Pisa, Italy; [Yuan, S.; Katsnelson, M. I.] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands; [Polini, M.; Vignale, G.] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Vignale, G.] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA; [Pinczuk, A.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA; [Pinczuk, A.] Columbia Univ, Dept Phys, New York, NY USA; [Pfeiffer, L. N.; West, K. W.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
英文摘要: Artificial crystal lattices can be used to tune repulsive Coulomb interactions between electrons. We trapped electrons, confined as a two-dimensional gas in a gallium arsenide quantum well, in a nanofabricated lattice with honeycomb geometry. We probed the excitation spectrum in a magnetic field, identifying collective modes that emerged from the Coulomb interaction in the artificial lattice, as predicted by the Mott-Hubbard model. These observations allow us to determine the Hubbard gap and suggest the existence of a Coulomb-driven ground state.
资助者: Chinese Academy of Sciences [KJCX2.YW.W10]; FOM (Foundation for Fundamental Research on Matter), the Netherlands; NSF [DMR-0803691, CHE-0641523, DMR-0705460]; Italian Ministry of research; Gordon and Betty Moore Foundation; NSF Materials Research Science and Engineering Centers through the Princeton Center for Complex Materials [DMR-0819860]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000291205200042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14340
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Singha, A,Gibertini, M,Karmakar, B,et al. Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice[J]. SCIENCE,2011,332(6034):1176-1179.
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