Many-body dispersions in interacting ballistic quantum wires

Ophir M. Auslaender; Hadar Steinberg; Amir Yacoby; Yaroslav Tserkovnyak; Bertrand I. Halperin; Rafael De Picciotto; Kirk W. Baldwin; Loren N. Pfeiffer; Ken W. West

doi:10.1016/j.ssc.2004.05.024

Many-body dispersions in interacting ballistic quantum wires

Ophir M. Auslaender^*, Hadar Steinberg, Amir Yacoby, Yaroslav Tserkovnyak, Bertrand I. Halperin, Rafael De Picciotto, Kirk W. Baldwin, Loren N. Pfeiffer, Ken W. West

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We have measured the collective excitation spectrum of interacting electrons in one-dimension. The experiment consists of controlling the energy and momentum of electrons tunneling between two clean and closely situated, parallel quantum wires in a GaAs/AlGaAs heterostructure while measuring the resulting conductance. We measure excitation spectra that clearly deviate from the non-interacting spectrum, attesting to the importance of Coulomb interactions. Notable is an observed 30% enhancement of the velocity of the main excitation branch relative to non-interacting electrons with the same density. In short wires, finite size effects resulting from broken translational invariance are observed. Spin-charge separation is manifested through moiré patterns reflecting different spin and charge excitation velocities.

Original language	English
Pages (from-to)	657-663
Number of pages	7
Journal	Solid State Communications
Volume	131
Issue number	9-10 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssc.2004.05.024
State	Published - Sep 2004
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported in part by the US-Israel BSF, the European Commission RTN Network Contract No. HPRN-CT-2000-00125 and NSF Grant DMR 02-33773. YT is supported by the Harvard Society of Fellows.

Keywords

A. Nanostructures
D. Electron-electron interactions
D. Electronic transport
D. Tunnelling

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10.1016/j.ssc.2004.05.024

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title = "Many-body dispersions in interacting ballistic quantum wires",

abstract = "We have measured the collective excitation spectrum of interacting electrons in one-dimension. The experiment consists of controlling the energy and momentum of electrons tunneling between two clean and closely situated, parallel quantum wires in a GaAs/AlGaAs heterostructure while measuring the resulting conductance. We measure excitation spectra that clearly deviate from the non-interacting spectrum, attesting to the importance of Coulomb interactions. Notable is an observed 30% enhancement of the velocity of the main excitation branch relative to non-interacting electrons with the same density. In short wires, finite size effects resulting from broken translational invariance are observed. Spin-charge separation is manifested through moir{\'e} patterns reflecting different spin and charge excitation velocities.",

keywords = "A. Nanostructures, D. Electron-electron interactions, D. Electronic transport, D. Tunnelling",

author = "Auslaender, {Ophir M.} and Hadar Steinberg and Amir Yacoby and Yaroslav Tserkovnyak and Halperin, {Bertrand I.} and {De Picciotto}, Rafael and Baldwin, {Kirk W.} and Pfeiffer, {Loren N.} and West, {Ken W.}",

note = "Funding Information: This work was supported in part by the US-Israel BSF, the European Commission RTN Network Contract No. HPRN-CT-2000-00125 and NSF Grant DMR 02-33773. YT is supported by the Harvard Society of Fellows.",

year = "2004",

month = sep,

doi = "10.1016/j.ssc.2004.05.024",

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volume = "131",

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journal = "Solid State Communications",

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AU - Auslaender, Ophir M.

AU - Steinberg, Hadar

AU - Yacoby, Amir

AU - Tserkovnyak, Yaroslav

AU - Halperin, Bertrand I.

AU - De Picciotto, Rafael

AU - Baldwin, Kirk W.

AU - Pfeiffer, Loren N.

AU - West, Ken W.

N1 - Funding Information: This work was supported in part by the US-Israel BSF, the European Commission RTN Network Contract No. HPRN-CT-2000-00125 and NSF Grant DMR 02-33773. YT is supported by the Harvard Society of Fellows.

PY - 2004/9

Y1 - 2004/9

N2 - We have measured the collective excitation spectrum of interacting electrons in one-dimension. The experiment consists of controlling the energy and momentum of electrons tunneling between two clean and closely situated, parallel quantum wires in a GaAs/AlGaAs heterostructure while measuring the resulting conductance. We measure excitation spectra that clearly deviate from the non-interacting spectrum, attesting to the importance of Coulomb interactions. Notable is an observed 30% enhancement of the velocity of the main excitation branch relative to non-interacting electrons with the same density. In short wires, finite size effects resulting from broken translational invariance are observed. Spin-charge separation is manifested through moiré patterns reflecting different spin and charge excitation velocities.

AB - We have measured the collective excitation spectrum of interacting electrons in one-dimension. The experiment consists of controlling the energy and momentum of electrons tunneling between two clean and closely situated, parallel quantum wires in a GaAs/AlGaAs heterostructure while measuring the resulting conductance. We measure excitation spectra that clearly deviate from the non-interacting spectrum, attesting to the importance of Coulomb interactions. Notable is an observed 30% enhancement of the velocity of the main excitation branch relative to non-interacting electrons with the same density. In short wires, finite size effects resulting from broken translational invariance are observed. Spin-charge separation is manifested through moiré patterns reflecting different spin and charge excitation velocities.

KW - A. Nanostructures

KW - D. Electron-electron interactions

KW - D. Electronic transport

KW - D. Tunnelling

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DO - 10.1016/j.ssc.2004.05.024

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AN - SCOPUS:3242761525

SN - 0038-1098

VL - 131

SP - 657

EP - 663

JO - Solid State Communications

JF - Solid State Communications

IS - 9-10 SPEC. ISS.

ER -

Many-body dispersions in interacting ballistic quantum wires

Abstract

Bibliographical note

Keywords

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