Unoccupied electronic states inNiS2−xSexacross the metal-insulator transition
- 15 March 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 57 (12), 6984-6988
- https://doi.org/10.1103/physrevb.57.6984
Abstract
We investigate the evolution of the electronic structure across the insulator-metal transition in with changing composition, but in the absence of any structural or magnetic changes. A comparison of the inverse photoemission spectra with band-structure calculations establishes the importance of correlation effects in these systems. Systematic changes in the spectral distribution establish the persistence of the upper Hubbard band well into the metallic regime, with the insulator-to-metal transition being driven by a transfer of spectral weight from the Hubbard band to states close to the Fermi energy.
Keywords
This publication has 10 references indexed in Scilit:
- Systematic Development of the Spectral Function in the Mott-Hubbard SystemPhysical Review Letters, 1995
- A structural phase transition induced by an external magnetic fieldNature, 1995
- Mott-Hubbard transition in infinite dimensions. IIPhysical Review B, 1994
- Empty states investigation of epitaxial Sn/Si(100) systemsSurface Science, 1994
- Filling dependence of electronic properties on the verge of metal–Mott-insulator transition inPhysical Review Letters, 1993
- Evolution of the spectral function in Mott-Hubbard systems withconfigurationPhysical Review Letters, 1992
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- Electron correlations in narrow energy bands III. An improved solutionProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
- The transition to the metallic statePhilosophical Magazine, 1961
- Magnetic Effects and the Hartree-Fock EquationPhysical Review B, 1951