Macroscopic and microscopic investigation of the microwave induced zero resistance state

微波诱导零电阻态的宏观和微观研究

• 批准号: 5246970
• 负责人: Dr. Jurgen H. Smet
• 金额: --
• 依托单位: Max-Planck-Institut für Festkörperforschung (MPI-FKF)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2000
• 资助国家: 德国
• 起止时间: 1999-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5246970?language=en
• 关键词: Macroscopic; microscopic; investigation; microwave; induced

In high mobility two-dimensional electron systems, subjected to a strong perpendicular magnetic field and cooled down to millikelvin temperatures, the strong repulsive Coulomb interaction between the electrons forces them to make an alliance with the elementary flux quanta threading the sample in order to minimize the interaction energy. The strong correlation between electrons and flux quanta at commensurate ratios results in the formation of composite fermions and the appearance of fractional quantum Hall states. Experimental probes other than conventional dc-magnetotransport, such as the electronic compressibility, the microwave photoconductivity and the time-resolved transport, will be brought to bear on single and bilayer quantum Hall systems in an attempt to further clarify these correlation effects. Emphasis will be put on addressing unresolved issues about the energy dispersion of composite fermions and to obtain information about the low-energy excitations at the edges.

在高迁移率二维电子系统中，受到强垂直磁场并冷却到毫开尔文温度，电子之间的强排斥库仑相互作用迫使它们与穿过样品的基本通量量子结盟，以使相互作用能最小化。电子与通量量子在公度比下的强关联导致了复合费米子的形成和分数量子霍尔态的出现。除了传统的直流磁输运，如电子的可压缩性，微波光电导性和时间分辨的运输，实验探针，将被带到承担在单层和双层量子霍尔系统，试图进一步澄清这些相关效应。重点将放在解决未解决的问题，复合费米子的能量色散，并获得有关的低能量激发的边缘信息。