Tunneling spectroscopy of quantum wires: Spin-charge separation and localization

A. Yacoby*, O. M. Auslaender, H. Steinberg, 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

1 Scopus citations

Abstract

Using a double wire geometry we probe the quantum many-body modes in ballistic wires and their dependence on Coulomb interactions. The wires are fabricated using the cleaved edge overgrowth method. We clearly observe two spin modes and one charge mode of the coupled wires. We map the dispersion velocities of the modes down to a critical density at which spontaneous localization is observed. Theoretical calculations of the charge velocity agree well with the data, although they also predict an additional charge mode that is not observed. Surprisingly, the suppression of the spin velocities does not depend on density.

Original languageAmerican English
Pages (from-to)3593-3603
Number of pages11
JournalPhysica Status Solidi (B): Basic Research
Volume243
Issue number14
DOIs
StatePublished - Nov 2006
Externally publishedYes

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