Kondo Lattice Scenario in Disordered Semiconductor Heterostructures
arXiv:0903.3612 · doi:10.1103/PhysRevLett.103.067203
Abstract
We study nuclear relaxation in the presence of localized electrons in a two-dimensional electron gas in a disordered delta-doped semiconductor heterostructure and show that this method can reliably probe their magnetic interactions and possible long-range order. In contrast, we argue that transport measurements, the commonly employed tool, may not sometimes distinguish between spatial disorder and long-range order. We illustrate the utility of using the nuclear relaxation method to detect long-range order by analyzing a recent proposal made on the basis of transport measurements, on the spontaneous formation of a two-dimensional Kondo lattice in a 2D electron gas in a heterostructure.
4 pages, 1 figure RevTeX, Published version, Added references
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