Interaction-driven groundstates of few-layer graphene

相互作用驱动的少层石墨烯基态

• 批准号: 242560533
• 负责人: Professor Dr. Carsten Honerkamp
• 金额: --
• 依托单位: Institut für Theoretische Festkörperphysik C
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/242560533?language=en
• 关键词: Interaction; driven; groundstates; few; layer

This theory project aims at a controlled and quantitative description of the interacting groundstates of mono-, bi- and trilayer graphene. Based on ab-initio parameters for a low-energy model containing the $\pi$-bands near the Fermi energy, we will make use of recent improvements in the functional renormalization group to analyze the dominant correlation functions of these few-layer systems at low energies and low temperatures. Our studies will predict theoretically more controlled phase boundaries between different groundstates in bi- and trilayers, and provide reliable estimates for the ordering temperatures and gap energy scales. In particular, we will investigate the competition between antiferromagnetic order and spontaneous Hall states, which both are of relevance for spintronics applications of graphene. In conjunction with planned ab-initio work we will analyze the possibilities to tune the systems into or out of these states.

这一理论项目旨在控制和定量描述单层、双层和三层石墨烯的相互作用基态。基于一个包含费米能区附近能带的低能模型的从头算参数，我们将利用泛函重整化群的最新改进来分析这些少数层系统在低能和低温下的主要关联函数。我们的研究将在理论上预测两层和三层中不同基态之间更可控的相界，并为有序温度和能级提供可靠的估计。特别是，我们将研究反铁磁有序和自发霍尔态之间的竞争，这两者都与石墨烯的自旋电子学应用有关。结合计划中的从头算工作，我们将分析将系统调整到这些状态或调出这些状态的可能性。