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Quantum Hall ferromagnetism of AlAs 2D electrons

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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Lynass,  M.
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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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., Lynass, M., Dietsche, W., von Klitzing, K., & Hauser, M. (2004). Quantum Hall ferromagnetism of AlAs 2D electrons. Physica E, 22(1-3), 94-97.


Cite as: https://hdl.handle.net/21.11116/0000-000E-F657-B
Abstract
We present magneto-transport measurements in tilted magnetic fields on
high mobility (mu = 300.000 cm(2)/V s) AlAs two-dimensional electron
systems. Our samples show integer and fractional quantum Hall effects.
In titled magnetic fields, at the crossings of Landau levels with
opposite spin, the resistance shows a spike if the crossing occurs near
integer filling or is significantly enhanced otherwise. The position of
the spike displays a hysteresis below 350 mK that reaches more than 0.1
T at 20 mK. From the position of the crossing in the (B-tot,
B-perp)-plane the difference in exchange energy of the crossing levels
is determined and found to be a non-linear function of the
perpendicular magnetic field. (C) 2003 Elsevier B.V. All rights
reserved.