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3D-to-2D transition by Cs intercalation of VSe 2

1993; American Physical Society; Volume: 70; Issue: 20 Linguagem: Inglês

10.1103/physrevlett.70.3111

1092-0145

H. I. Starnberg, H.E. Brauer, L. J. Holleboom, H. P. Hughes,

Perovskite Materials and Applications

Angle-resolved photoemission spectroscopy has been employed to study in situ intercalation of the layered compound ${\mathrm{VSe}}_{2}$ with Cs. The results show that the valence band structure of ${\mathrm{VSe}}_{2}$, which initially is of 3D character, is transformed to become essentially 2D upon Cs intercalation. The changes, which go far beyond the rigid-band model, are successfully reproduced by self-consistent linear-augmented-plane-wave calculations. This is the first report of a UHV compatible system where the dimensionality of the electronic structure can be controlled in situ.