Exchange interaction in magnetic HgMnTe quantum well structure

Low temperature magnetotransport measurements have been used to study the exchange interactions in Hg1–x Mnx 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 0α and N 0β , the anti...

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Veröffentlicht in:	Physica Status Solidi (b) 2006-03, Vol.243 (4), p.835-838
Hauptverfasser:	Liu, Jian, Buhmann, Hartmut, Novik, Elena G., Gui, Yongsheng, Hock, Volkmar, Becker, Charles R., Molenkamp, Laurens W.
Format:	Artikel
Sprache:	eng
Schlagworte:	71.70.Gm 72.20.My 73.61.Ga Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in multilayers, nanoscale materials and structures Exact sciences and technology Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures) Magnetic properties and materials Magnetic properties of surface, thin films and multilayers Physics Quantum wells
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Zusammenfassung:	Low temperature magnetotransport measurements have been used to study the exchange interactions in Hg1–x Mnx 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 0α and N 0β , 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)
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200564610