Experimental evidence for the formation of stripe phases in Si/SiGe
U. Zeitler, H. W. Schumacher, A. G. M. Jansen, R. J. Haug
Abstract
We observe pronounced transport anisotropies in magneto-transport experiments performed in the two-dimensional electron system of a Si/SiGe heterostructure. They occur when an in-plane field is used to tune two Landau levels with opposite spin to energetic coincidence. The observed anisotropies disappear drastically for temperatures above 1 K. We propose that our experimental findings may be caused by the formation of a unidirectional stripe phase oriented perpendicular to the in-plane field.
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