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

doi:10.1126/science.1107821

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 journal › Article › peer-review

340 Scopus citations

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.

Original language	English
Pages (from-to)	88-92
Number of pages	5
Journal	Science
Volume	308
Issue number	5718
DOIs	https://doi.org/10.1126/science.1107821
State	Published - 1 Apr 2005
Externally published	Yes

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title = "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.",

author = "Auslaender, {O. M.} and H. Steinberg and A. Yacoby and Y. Tserkovnyak and Halperin, {B. I.} and Baldwin, {K. W.} and Pfeiffer, {L. N.} and West, {K. W.}",

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doi = "10.1126/science.1107821",

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AU - Auslaender, O. M.

AU - Steinberg, H.

AU - Yacoby, A.

AU - Tserkovnyak, Y.

AU - Halperin, B. I.

AU - Baldwin, K. W.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2005/4/1

Y1 - 2005/4/1

N2 - 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.

AB - 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.

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VL - 308

SP - 88

EP - 92

JO - Science

JF - Science

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Spin-charge separation and localization in one dimension

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