Small scale lateral superlattices in two-dimensional electron gases prepared by diblock copolymer masks
arXiv:0806.3896 · doi:10.1063/1.2981567
Abstract
A poly(styrene-block-methylmethacrylate) diblock copolymer in the hexagonal cylindrical phase has been used as a mask for preparing a periodic gate on top of a Ga[Al]As-heterostructure. A superlattice period of 43 nm could be imposed onto the two-dimensional electron gas. Transport measurements show a characteristic positive magnetoresistance around zero magnetic field which we interpret as a signature of electron motion guided by the superlattice potential.
3 pages, 3 figures
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