DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 16: Correlated Electrons: Low-dimensional Systems - Models 2

TT 16.13: Talk

Tuesday, March 27, 2012, 12:45–13:00, H 0104

The effect of a local perturbation in a fermionic ladderSam Carr1, •Boris Narozhny1, and Alexander Nersesyan2,3,41Institut für Theorie der Kondensierten Materie and DFG Center for Functional Nanostructures, Karlsruher Institut für Technologie, 76128 Karlsruhe, Germany — 2The Abdus Salam International Centre for Theoretical Physics, 34100, Trieste, Italy — 3The Andronikashvili Institute of Physics, 0177, Tbilisi, Georgia — 4Ilia State University, Institute of Theoretical Physics, 0162, Tbilisi, Georgia

We study the effect of a local external potential on a system of two parallel nanowires placed close to each other. For single channel, spin-polarized nanowires with repulsive interaction we find that transport properties of the system are highly sensitive to the transverse gradient of the perturbation: the asymmetric part completely reflects the electrons leading to vanishing conductance at zero temperature, while the flat potential remains transparent. We envisage a possible application of this unusual property in the sensitive measurement of local potential field gradients. We then further extend our results to the case of nanowires in the absence of the polarized field.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin