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Softening of spin resonance at low temperature in p-doped Cd1-xMnxTe quantum wells 
Auteur(s): Scalbert D., Teppe F., Vladimirova M., Tatarenko S., Cibert J., Nawrocki M.
(Article) Publié:
Physical Review B, vol. 70 p.245304 (2004)
Ref HAL: hal-00440502_v1
DOI: 10.1103/PhysRevB.70.245304
WoS: 000226112300062
Exporter : BibTex | endNote
14 Citations
Résumé: Time-domain spin resonances in p-doped CdMnTe quantum wells have been studied via time-resolved magneto-optical Kerr rotation. The resonances related to quantum well electrons Mn and electrons excited in the substrate are identified. An additional spin resonance which shows an unusual temperature dependence is detected in one of the samples. The corresponding frequency tends to zero when approaching the Curie temperature. This "soft" spin precession mode has been studied as a function of magnetic field, temperature, magnetic field orientation, and optical excitation density. Its origin is discussed in the framework of the existing collective spin excitation model.
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Scaling and universality of self-organized patterns on unstable vicinal surfaces.
Auteur(s): Pimpinelli A., Tonchev V., Videcoq Arnaud, Vladimirova M.
(Article) Publié:
Physical Review Letters, vol. p.206104 (2002)
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Dimer diffusion as a driving mechanism of the step bunching instability during homoepitaxial growth
Auteur(s): Vladimirova M., de Vita A., Pimpinelli A.
(Article) Publié:
-Physical Review B Condensed Matter And Materials Physics (1998-2015), vol. 64 p.245420-245426 (2001)
Texte intégral en Openaccess : 
Ref HAL: hal-00272531_v1
DOI: 10.1103/PhysRevB.64.245420
WoS: 000173082500114
Exporter : BibTex | endNote
23 Citations
Résumé: The impact of ad-dimer diffusion on the morphology of an epitaxially growing stepped surface is studied analytically and by kinetic Monte Carlo simulations. It is shown that if diffusing adatoms are hindered by an Ehrlich-Schwoebel barrier at step edges, ad-dimer diffusion gives rise to a step bunching instability, provided that the corresponding Ehrlich-Schwoebel barrier for ad-dimers is small or vanishing.
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