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

doi:10.1002/pssb.200642223

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 journal › Article › peer-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 language	English
Pages (from-to)	3593-3603
Number of pages	11
Journal	Physica Status Solidi (B): Basic Research
Volume	243
Issue number	14
DOIs	https://doi.org/10.1002/pssb.200642223
State	Published - Nov 2006
Externally published	Yes

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title = "Tunneling spectroscopy of quantum wires: Spin-charge separation and localization",

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.",

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

year = "2006",

month = nov,

doi = "10.1002/pssb.200642223",

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T2 - Spin-charge separation and localization

AU - Yacoby, A.

AU - Auslaender, O. M.

AU - Steinberg, H.

AU - Tserkovnyak, Y.

AU - Halperin, B. I.

AU - Baldwin, K. W.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2006/11

Y1 - 2006/11

N2 - 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.

AB - 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.

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JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

IS - 14

ER -

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

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