2013/09/11 by Michael J. Manfra, Manfra, Michael J. · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1309.2717
35 pages, 14 figures, invited review submitted to Annual Review of Condensed Matter Physics
arxiv created 2013/09/11 · arxiv updated 2013/09/12
Among very low disorder systems of condensed matter, the high mobility two-dimensional electron gas confined in gallium arsenide/aluminum gallium arsenide heterostructures holds a privileged position as platform for the discovery of new electronic states driven by strong Coulomb interactions. Molecular beam epitaxy (MBE), an ultra-high vacuum thin-film deposition technique, produces the highest quality 2DEGs and has played a central role in a number of discoveries that have at their root the interplay of reduced dimensionality, strong electron-electron interactions, and disorder. This review attempts to describe the latest developments in heterostructure design, MBE technology, and our evolving understanding of disorder that result in improved material quality and facilitate discovery of new phenomena at ever finer energy scales.