Small scale lateral superlattices in two-dimensional electron gases prepared by diblock copolymer masks
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 / Al x Ga 1 − x As heterostructure. A superlattice period of 43 nm could be imposed on the two-dimensional electron gas. Transport meas...
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| Veröffentlicht in: | Applied physics letters 2008-09, Vol.93 (10), p.102110-102110-3 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | 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
/
Al
x
Ga
1
−
x
As
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. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.2981567 |