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Science 29 September 2006:
Vol. 313. no. 5795, p. 1849
DOI: 10.1126/science.313.5795.1849b
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This Week in Science

Oxides tend to be insulators, but the interface region between two oxides can be grown to support a high-mobility, two-dimensional electron gas that can display a range of functional characteristics, such as superconductivity, magnetism, and ferroelectric behavior. Using oxide heterostructures, Thiel et al. (p. 1942, published online 24 August; see the Perspective by Hwang) now show the conductance of the interface region can be modulated over many orders of magnitude by applying an electric field. The versatility of these oxide materials and the ability to switch the behavior with an electric field bode well for potential applications.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)