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Journal Article

Negative magneto-drag of double layer 2DEGs

MPS-Authors
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Lok,  J. G. S.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Kraus,  S.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Dietsche,  W.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;

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von Klitzing,  K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Schwerdt,  F.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Hauser,  M.
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Lok, J. G. S., Kraus, S., Dietsche, W., von Klitzing, K., Schwerdt, F., Hauser, M., et al. (2002). Negative magneto-drag of double layer 2DEGs. Physica E, 12(1-4), 119-124.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E9B9-B
Abstract
We present friction measurements (drag) between two 2DEGs in a
magnetic field in the integer quantum Hall regime. At matched
densities, the double peak in the drag that occurs when the
longitudinal resistances of each 2DEG do not show any sign of
spin splitting is observed, For unequal densities in the 2DEGs,
a 1/B periodic oscillation around zero appears. Both effects
are well described by a phenomenological model assuming a
negative drag between electrons with opposite spin and a
positive drag between electrons with the same spin. Experiments
in tilted magnetic field and on low-mobility samples show that
when the spin gap becomes large, the negative drag disappears.
(C) 2002 Elsevier Science B.V. All rights reserved.