Dresden 2006 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
TT: Tiefe Temperaturen
TT 5: Transport: Nanoelectronics I - Quantum Dots, Wires, Point Contacts - Part 1
TT 5.12: Vortrag
Montag, 27. März 2006, 12:45–13:00, HSZ 304
Photo-assisted transport in the Luttinger Liquid with weak disorder — •Dmitry Bagrets — Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128, Karlsruhe, Germany
We consider a photo-assisted transport through a one-dimensional interacting wire (Luttinger Liquid) with a weak disorder. The photo-assisted conductance, current shot noise and generally the full counting statistics (FCS) of charge transfer are evaluated under the presence of alternating bias voltage of the form V(t)=Vdc + Vac cos(Ω t), Ω being a driven frequency. The Coulomb interaction is treated exactly, while the backscattering due to impurities is considered in the second order Born approximation. The FCS of backscattering current is a bidirectional Poissonian process. In the limit of large Ω and dc applied voltage Vdc as compared to the Thouless energy of the wire the differential conductance and photo-assisted shot noise exhibit a series of power low singularities of the form ∼ |nΩ − eVdc|g−1 as a function of dc voltage, where g<1 is the interaction constant in the wire. The experimental verification of this phenomenon is feasible in the 10-20 GHz range of Ω with the use of V-groove and cleaved edge overgrowth GaAs nanowires.