Journal Article

PreJuSER-6294

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Critical behavior of density of states near Fermi energy in low-dimensional disordered metals

Sasioglu, E.FZJ* ; Caliskan, S. ; Kumru, M.

2009
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/11020  doi:10.1103/PhysRevB.79.035123

Abstract: We study the effect of electron-electron interaction on the one-particle density of states (DOS) rho((d))(epsilon,T) of low-dimensional disordered metals near Fermi energy within the framework of the finite temperature conventional impurity diagram technique. We consider only diffusive limit and, by a geometric resummation of the most singular first-order self-energy corrections via the Dyson equation, we obtain a nondivergent solution for the DOS at low energies while for higher energies the well-known Altshuler-Aronov corrections are recovered. At the Fermi level rho((d))(epsilon,T=0)-> 0, this indicates that interacting disordered two-dimensional and quasi-one-dimensional systems are in insulating state at zero temperature. The obtained results are in good agreement with recent tunneling experiments on two-dimensional GaAs/AlGaAs heterostructures and quasi-one-dimensional doped multiwall carbon nanotubes.

Keyword(s): J ; critical phenomena (auto) ; electronic density of states (auto) ; Fermi level (auto) ; perturbation theory (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)
2. Quanten-Theorie der Materialien (IAS-1)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2009

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