Quantized acoustoelectric current in the presence of large tunneling counterflow

K. Gloos, P. Utko, Jørn Bindslev Hansen, Poul Erik Lindelof

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Abstract

A surface acoustic wave drives an electrical current through a short quantum wire. A second tunneling current is injected by biasing one side of the quantum wire. These two contributions to the total current, which flow in opposite directions, are controlled almost independently by the gate and the bias voltage, respectively. We have observed the quantization of the acoustoelectric current at up to ten times larger counterflowing tunneling currents. At large tunneling currents the acoustoelectric current can be strongly suppressed. However, this does not seem to be due to an electrostatic interaction between the two currents, but is probably caused by the complex potential landscape in the narrow channel of the quantum wire.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume70
Issue number23
Pages (from-to)235345
ISSN0163-1829
DOIs
Publication statusPublished - 2004

Bibliographical note

Copyright (2004) American Physical Society.

Keywords

  • CHANNEL
  • QUANTUM WIRES
  • FABRICATION
  • SINGLE-ELECTRON TRANSPORT
  • WAVES
  • ACOUSTIC CHARGE-TRANSPORT
  • PERPENDICULAR MAGNETIC-FIELD
  • POINT CONTACTS
  • GATE

Cite this

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title = "Quantized acoustoelectric current in the presence of large tunneling counterflow",
abstract = "A surface acoustic wave drives an electrical current through a short quantum wire. A second tunneling current is injected by biasing one side of the quantum wire. These two contributions to the total current, which flow in opposite directions, are controlled almost independently by the gate and the bias voltage, respectively. We have observed the quantization of the acoustoelectric current at up to ten times larger counterflowing tunneling currents. At large tunneling currents the acoustoelectric current can be strongly suppressed. However, this does not seem to be due to an electrostatic interaction between the two currents, but is probably caused by the complex potential landscape in the narrow channel of the quantum wire.",
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author = "K. Gloos and P. Utko and Hansen, {J{\o}rn Bindslev} and Lindelof, {Poul Erik}",
note = "Copyright (2004) American Physical Society.",
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doi = "10.1103/PhysRevB.70.235345",
language = "English",
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pages = "235345",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
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}

Quantized acoustoelectric current in the presence of large tunneling counterflow. / Gloos, K.; Utko, P.; Hansen, Jørn Bindslev; Lindelof, Poul Erik.

In: Physical Review B Condensed Matter, Vol. 70, No. 23, 2004, p. 235345.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Quantized acoustoelectric current in the presence of large tunneling counterflow

AU - Gloos, K.

AU - Utko, P.

AU - Hansen, Jørn Bindslev

AU - Lindelof, Poul Erik

N1 - Copyright (2004) American Physical Society.

PY - 2004

Y1 - 2004

N2 - A surface acoustic wave drives an electrical current through a short quantum wire. A second tunneling current is injected by biasing one side of the quantum wire. These two contributions to the total current, which flow in opposite directions, are controlled almost independently by the gate and the bias voltage, respectively. We have observed the quantization of the acoustoelectric current at up to ten times larger counterflowing tunneling currents. At large tunneling currents the acoustoelectric current can be strongly suppressed. However, this does not seem to be due to an electrostatic interaction between the two currents, but is probably caused by the complex potential landscape in the narrow channel of the quantum wire.

AB - A surface acoustic wave drives an electrical current through a short quantum wire. A second tunneling current is injected by biasing one side of the quantum wire. These two contributions to the total current, which flow in opposite directions, are controlled almost independently by the gate and the bias voltage, respectively. We have observed the quantization of the acoustoelectric current at up to ten times larger counterflowing tunneling currents. At large tunneling currents the acoustoelectric current can be strongly suppressed. However, this does not seem to be due to an electrostatic interaction between the two currents, but is probably caused by the complex potential landscape in the narrow channel of the quantum wire.

KW - CHANNEL

KW - QUANTUM WIRES

KW - FABRICATION

KW - SINGLE-ELECTRON TRANSPORT

KW - WAVES

KW - ACOUSTIC CHARGE-TRANSPORT

KW - PERPENDICULAR MAGNETIC-FIELD

KW - POINT CONTACTS

KW - GATE

U2 - 10.1103/PhysRevB.70.235345

DO - 10.1103/PhysRevB.70.235345

M3 - Journal article

VL - 70

SP - 235345

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 1098-0121

IS - 23

ER -