Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.12: Poster

Freitag, 4. März 2005, 14:00–18:00, Poster TU C

Density of states of interacting electrons in quasi one-dimensional metallic wires — •Wolfgang Körner¹, Peter Schwab², and Hermann Grabert¹ — ¹Albert-Ludwigs-Universität Freiburg — ²Universität Augsburg

Based on the quasiclassical Green’s function approach [1] we determine the tunneling density of states ρ(ε) of a diffusive metallic nanowire in presence of electron-electron interactions. The perturbative result by Altshuler and Aronov, ρ(ε)∝ ε^−1/2, is extended to the nonperturbative regime near the Fermi edge where ρ(ε)∝ √εexp(−ε₀/ε), in accordance with calculations based on the nonlinear σ-model [2]. Further extensions, including contributions from the spin triplet channel, will also be discussed.

[1] P. Schwab and R. Raimondi, Ann. Phys. (Leipzig) 12, 471-516 (2003)

[2] J. Rollbühler and H. Grabert, Phys. Rev. Lett. 87, 126804 (2001)