Spin-Charge Separation and Localization in One Dimension

Abstract

We report on measurements of quantum many-body modes in ballistic wires and their dependence on Coulomb interactions, obtained by tunneling between two parallel wires in an GaAs/AlGaAs heterostructure while varying electron density. We observed two spin modes and one charge mode of the coupled wires and mapped the dispersion velocities of the modes down to a critical density, at which spontaneous localization was observed. Theoretical calculations of the charge velocity agree well with the data, although they also predict an additional charge mode that was not observed. The measured spin velocity was smaller than theoretically predicted.

Keywords

Condensed matter physicsHeterojunctionQuantum tunnellingSpin (aerodynamics)CoulombCharge (physics)ElectronPhysicsDispersion (optics)Charge densityQuantum mechanics

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Publication Info

Year: 2005
Type: article
Volume: 308
Issue: 5718
Pages: 88-92
Citations: 384
Access: Closed

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APA Style

                            
                                
                                    Ophir M. Auslaender, 
                                
                                    Hadar Steinberg, 
                                
                                    Amir Yacoby
                                
                                et al.
                            
                            (2005). 
                            Spin-Charge Separation and Localization in One Dimension. 
                            Science
                            , 308
                            (5718)
                            , 88-92.
                            https://doi.org/10.1126/science.1107821
                        

Identifiers

DOI: 10.1126/science.1107821