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  Quantum Hall ferromagnetism of AlAs 2D electrons

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.

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 Creators:
Lok, J. G. S.1, Author           
Lynass, M.1, Author           
Dietsche, W.1, 2, 3, Author           
von Klitzing, K.1, Author           
Hauser, M.3, Author           
Affiliations:
1Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370504              
2Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370501              
3Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370499              

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Free keywords: AlAs 2DES; quantum Hall effects; quantum Hall ferromagnetism
 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.

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Language(s): eng - English
 Dates: 2004
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 192887
ISI: 000221140800022
 Degree: -

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Title: Physica E
Source Genre: Journal
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Pages: - Volume / Issue: 22 (1-3) Sequence Number: - Start / End Page: 94 - 97 Identifier: ISSN: 1386-9477