Small scale lateral superlattices in two-dimensional electron gases prepared by diblock copolymer masks

2008/06/25 by S. Hugger, T. Heinzel, T. Thurn-Albrecht · 1 citation
Materials Science · Physics and Astronomy · #Block Copolymer Self-Assembly #Copolymer #Electron #Electron mobility #Hexagonal crystal system #Magnetoresistance #Phase (matter) #Phase diagram #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Superlattice #cond-mat.mes-hall

paper · pdf · doi:10.1063/1.2981567

published as Appl. Phys. Lett. 93, 102110 (2008) · 3 pages, 3 figures

arxiv created 2008/06/25 · openalex publication_date 2008/09/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 GaAs/AlxGa1−xAs heterostructure. A superlattice period of 43 nm could be imposed on 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.

Citations

• Commensurability oscillations due to pinned and drifting orbits in a two-dimensional lateral surface superlattice
• Spin qubits in antidot lattices
• Laterally modulated 2D electron systems in the extreme quantum limit.
• Magnetoresistance of antidot lattices with grain boundaries

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