Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 12: Correlated Electrons: Low-dimensional Systems - Models

TT 12.10: Vortrag

Dienstag, 28. März 2006, 12:00–12:15, HSZ 304

Fermi edge singularities at finite temperature — •Carsten von Zobeltitz and Holger Frahm — Institut für Theoretische Physik, Universität Hannover, 30167 Hannover

Fermi edge singularities (FES) as observed e.g. in X-ray absorption or tunneling experiments for non-interacting electrons can be described analytically by means of bosonization [1]. Within this approach we compute the thermal broadening of these singularities. This allows to collapse data from different temperatures onto a single curve. The same approach is used to describe edge singularities appearing in 1d correlated systems described by a Luttinger liquid. Applications to tunneling through semiconductor quantum dots are discussed.

[1] K.D. Schotte and U. Schotte, Phys. Rev. 182 (1969) 479