Exchange interaction in magnetic HgMnTe quantum well structure

• Published in: Physica Status Solidi (b) 2006-03, Vol.243 (4), p.835-838
• Main Authors: Liu, Jian, Buhmann, Hartmut, Novik, Elena G., Gui, Yongsheng, Hock, Volkmar, Becker, Charles R., Molenkamp, Laurens W.
• Format: Article
• Language: English
• Subjects: 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
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200564610

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)