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Exchange interaction in magnetic HgMnTe quantum well structure
Author(s) -
Liu Jian,
Buhmann Hartmut,
Novik Elena G.,
Gui Yongsheng,
Hock Volkmar,
Becker Charles R.,
Molenkamp Laurens W.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200564610
Subject(s) - antiferromagnetism , condensed matter physics , exchange interaction , chemistry , quantum , quantum well , spin (aerodynamics) , physics , ferromagnetism , quantum mechanics , thermodynamics , laser
Low temperature magnetotransport measurements have been used to study the exchange interactions in Hg 1– x Mn x Te magnetic quantum wells (QWs). An analysis of Shubnikov–de Haas oscillations in conjunction with 8 × 8 k · p bandstructure calculations allow the exchange constants N 0 α and N 0 β , the antiferromagnetic temperature T 0 , and the effective spin S 0 to be determined. The latter displays a distinct temperature dependence and appears to be enhanced compared with bulk materials of equivalent Mn concentrations. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)