Regensburg 2004 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
SYNF: Non-Fermi Liquids in Quantum Structures
SYNF 1: Non-Fermi Liquids in Quantum Structures
SYNF 1.3: Hauptvortrag
Donnerstag, 11. März 2004, 16:10–16:45, H 1
Probing spin-charge separation in tunnel-coupled parallel quantum wires — •M. Governale1 and U. Zülicke2 — 1Scuola Normale Superiore, piazza dei Cavalieri 7, I-56100 Pisa, Italy — 2Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
Interactions in one-dimensional electron systems are expected to cause a dynamical separation of electronic spin and charge degrees of freedom. This non-Fermi liquid phenomenon, called spin-charge separation, manifests itself as a double peak structure in the single-electron spectral function, and can be detected by momentum-resolved tunneling spectroscopy. A promising setup consists of two quantum wires coupled by an extended uniform tunnel barrier[1].
We consider a minimal model for one-dimensional interacting electrons exhibiting spin-charge separation, where we neglect interactions between electrons with opposite chirality. We present results for the differential tunneling conductance and we discuss the features arising from spin-charge separation. Furthermore, we provide a theoretical framework to go beyond the perturbative treatment of tunneling, and we calculate the density-density response function[2].
[1] O. M. Auslander, A. Yacoby, R. de Picciotto, K. W. Baldwin, L. N. Pfeiffer, and K. W. West, Science 295, 825 (2002).
[2] U. Zülicke, and M. Governale, Phys. Rev. B 65, 205304 (2002).