PMID: 15245244Jul 13, 2004Paper

Anisotropic metal-insulator transition in epitaxial thin films

Physical Review Letters
I B AltfederV Narayanamurti

Abstract

By comparing the properties of In and Pb quantum wells in a scanning tunneling microscopy subsurface imaging experiment, we found the existence of lateral bound states, a 2D Mott-Hubbard correlation gap, induced by transverse confinement. Its formation is attributed to spin or charge overscreening of quasi-2D excitations. The signature of the 2D confinement-deconfinement transition is also experimentally observed, with the correlation gap being pinned in the middle of the conduction band. A self-organized 2D Anderson lattice is suggested as a new ground state.

References

Oct 17, 1988·Physical Review Letters·A W Overhauser, L L Daemen
Sep 6, 2000·Physical Review Letters·V J EmeryT C Lubensky
May 15, 2002·Physical Review Letters·I B AltfederD M Chen

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Citations

Mar 11, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J H DilK Horn
Aug 26, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Y LiuT C Chiang
Apr 28, 2009·Physical Review Letters·I B AltfederJ Krim
Feb 9, 2005·Physical Review Letters·Stefano ColonnaMarco Grioni
Oct 15, 2008·Physical Review Letters·I B Altfeder, D M Chen

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