Publication

Noble metal surface states: deviations from parabolic dispersion

Klaus Kern, Harald Brune
2000
Journal Articles

Abstract

Dispersion relations of the s-p derived surface state on (111) surfaces of silver and copper have been measured using low-temperature scanning tunneling microscopy and spectroscopy. For silver as well as for copper we find a significant deviation from a parabolic dispersion characteristic of free-electron-like systems. A simple tight-binding model accounts for the trends in the measured dispersions. (C) 2000 Elsevier Science B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/15e3fbc5-40fe-4aa6-9ffd-5a54b4d260fa

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Klaus Kern, Harald Brune
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/15e3fbc5-40fe-4aa6-9ffd-5a54b4d260fa

About this result

Related concepts (32)

Free electron model

In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.

Density of states

In solid-state physics and condensed matter physics, the density of states (DOS) of a system describes the number of modes per unit frequency range. The density of states is defined as , where is the number of states in the system of volume whose energies lie in the range from to . It is mathematically represented as a distribution by a probability density function, and it is generally an average over the space and time domains of the various states occupied by the system.

Surface states

Surface states are electronic states found at the surface of materials. They are formed due to the sharp transition from solid material that ends with a surface and are found only at the atom layers closest to the surface. The termination of a material with a surface leads to a change of the electronic band structure from the bulk material to the vacuum. In the weakened potential at the surface, new electronic states can be formed, so called surface states.

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Noble metal surface states: deviations from parabolic dispersion

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