Spin-charge separation and localization in one dimension

O. M. Auslaender, H. Steinberg, A. Yacoby*, Y. Tserkovnyak, B. I. Halperin, K. W. Baldwin, L. N. Pfeiffer, K. W. West

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

335 Scopus citations


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.

Original languageAmerican English
Pages (from-to)88-92
Number of pages5
Issue number5718
StatePublished - 1 Apr 2005
Externally publishedYes


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