Wurstbauer, Ursula and Gronwald, Imke and Stoeberl, U and Vogl, Anton and Schuh, Dieter and Weiss, Dieter and Wegscheider, Werner (2008) Ferromagnetic Mn modulation-doped two-dimensional hole systems. Physica E 40, p. 1563.
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Other URL: http://www.sciencedirect.com/science?_ob=ArticleListURL&_method=list&_ArticleListID=719719618&_sort=d&view=c&_acct=C000032338&_version=1&_urlVersion=0&_userid=616165&md5=362b16feb25d5da275a9343c7ba06210, http://www.sciencedirect.com/science/journal/13869477
Mn modulation-doped strain relaxed In0.75Ga0.25As/In0.75Al0.25As single quantum-well (SQW) structures on (0 0 1) GaAs with an embedded InAs channel are fabricated by molecular beam epitaxy. The properties of the magnetic two-dimensional hole system were investigated by magnetotransport measurements up to 19 T in the temperature range from 50mK to room temperature. In the lowtemperature regime typical features of the quantum Hall effect like quantized plateaus at the Hall resistance and Shubnikov-de Haas oscillations in the longitudinal resistance are observable. The resistance at B ¼ 0T shows a distinct temperature dependence, and at low temperatures, a large negative magnetoresistance. Furthermore, a hysteretic behavior and jumps in the resistance below 300mK and around B ¼ 0T can be observed for an asymmetric QW structure.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 15:18|
|Last Modified:||05 Aug 2009 15:57|
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