2005/03/31 by O. M. Auslaender, Ophir M. Auslaender, H. Steinberg +12 · 3 citations
Materials Science · Physics and Astronomy · #High voltage insulation and dielectric phenomena #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1126/science.1107821
published as Science 308, 88-92 (2005) · There are minor textual differences between this version and the version that has been published in Science (follow the DOI link below to obtain it). In addition, here we have had to reduce figure quality to save space on the server
arxiv created 2005/07/03 · arxiv updated 2009/12/01 · openalex publication_date 2013/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
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.