Anisotropic Metal-Insulator Transition in Epitaxial Thin Films

Details Anisotropic Metal-Insulator Transition in Epitaxial Thin Films Anisotropic Metal-Insulator Transition in Epitaxial Thin Films

2003-11-04

arxiv.org/abs/cond-mat/0311081v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.92.226404

Quantum wells made of simple polyvalent metals represent a novel family of doped 2D Mott-Hubbard insulators. As scanning tunneling microscopy experiments show, these systems exhibit an anisotropic form of metal-insulator transition. Their elementary excitations possess coherent wave-like properties along the normal axis, and show an incoherent behavior in-plane. The development of such an anisotropic coherence is most likely related to Coulomb interaction between localized and delocalized thin film electronic states - 2D Kondo screening.

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