Collective character of spin excitations in a system of Mn2+ spins coupled to a two-dimensional electron gas

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.91.077201
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TypeArticle
Journal titlePhysical Review Letters
Volume91
Issue7
Pages077201
AbstractWe have studied the low energy spin excitations in n-type CdMnTe based dilute magnetic semiconductor quantum wells. For magnetic fields for which the energies for the excitation of free carriers and Mn spins are almost identical, an anomalously large Knight shift is observed. Our findings suggest the existence of a magnetic-field-induced ferromagnetic order in these structures, which is in agreement with recent theoretical predictions [J. König and A. H. MacDonald, Phys. Rev. Lett. 91, 077202 (2003)].
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12744398
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Record identifier412c0b20-1d4d-4dd8-86be-d519aa83da27
Record created2009-10-27
Record modified2016-05-09
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