Phys. Rev. Lett. 90, 036802 (2003) [4 pages]Artificial Dielectric Superlattices with Broken Inversion SymmetryReceived 24 May 2002; published 24 January 2003 A variety of three-constituent superlattice patterns were made in atomic layer-by-layer films, with patterns breaking inversion symmetry giving effective permanent bias fields ranging up to about 200 kV/cm. Dielectric constants at room temperature were nearly 103, with loss tangents under 0.01. Most of the response came from discrete dipoles comprising multiple unit cells, but without any ferroelectric phase transition. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.036802
DOI:
10.1103/PhysRevLett.90.036802
PACS:
73.21.Cd, 77.55.+f, 77.84.Dy
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