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In-plane magnetodrag between dilute two-dimensional systems.

R Pillarisetty1, Hwayong Noh, E Tutuc

  • 1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.

Physical Review Letters
|July 15, 2003
PubMed
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We studied double layer 2D hole systems using magnetodrag measurements. The in-plane magnetic field showed similar behavior to single-layer systems, with drag enhancement peaking at matched layer densities.

Area of Science:

  • Condensed matter physics
  • Quantum phenomena in 2D systems

Background:

  • Two-dimensional (2D) hole systems exhibit unique electronic properties.
  • Magnetotransport phenomena in layered 2D electron and hole systems are crucial for understanding electron-electron interactions.
  • The magnetodrag effect probes interactions between spatially separated 2D carrier systems.

Purpose of the Study:

  • To investigate the in-plane magnetodrag effect in dilute double layer 2D hole systems.
  • To explore the influence of in-plane magnetic fields on the apparent metallic behavior and spin polarization.
  • To compare the magnetodrag behavior with single-layer magnetoresistance.

Main Methods:

  • In-plane magnetodrag measurements were conducted.
  • Dilute double layer 2D hole systems were utilized.

Related Experiment Videos

  • Measurements were performed at various in-plane magnetic fields, including those suppressing metallic behavior and exceeding full spin polarization.

    • Main Results:

    • The magnetodrag exhibited the same qualitative behavior as single-layer magnetoresistance.
    • An enhancement in drag due to the in-plane field was observed.
    • This enhancement showed a strong maximum when the densities of both layers were matched.

    Conclusions:

    • The in-plane magnetic field's effect on magnetodrag in double layer 2D hole systems mirrors single-layer behavior.
    • Matched layer densities optimize the enhancement of drag by in-plane fields.
    • These findings provide insights into spin polarization and electron-electron interactions in layered 2D systems.