Spin Valve Effect and Hall Resistance in a Wide Parabolic Well
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2006
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| _version_ | 1876430331498725376 |
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| author | C. A. Duarte |
| author_facet | C. A. Duarte |
| contents | Spin Valve Effect and Hall Resistance in a Wide Parabolic Well C. A. Duarte G. M. Gusev A. A. Quivy T.E. Lamas Física, Astronomía y Matemáticas Spin valve Hall resistance AlcGa1¡cAs parabolic wells We report observation of the Hall slope change in wide AlcGa1¡cAs parabolic wells in the presence of aquasi-parallel magnetic field. Above the critical magnetic field B>4T, the Hall resistance becomes temperaturedependent and can be described by equation Rxy=cosQ » (B¡B0)=ens, where ns is the electron density, B0=2-2.6 T and Q is the angle between magnetic field and the normal to the well plane. The effect strongly dependson the electron density; it is observed only in parabolic wells, which are almost completely filled by electrons.We attribute the Hall slope change to the unusual behaviour of the effective g f actor in such parabolic well,which depends on the Al composition and changes the sign along the well width. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436368 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.36 |
| format | Artículo científico |
| id | redalyc_46436368 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Spin Valve Effect and Hall Resistance in a Wide Parabolic Well C. A. Duarte Física, Astronomía y Matemáticas Spin valve Hall resistance AlcGa1¡cAs parabolic wells Spin Valve Effect and Hall Resistance in a Wide Parabolic Well C. A. Duarte G. M. Gusev A. A. Quivy T.E. Lamas Física, Astronomía y Matemáticas Spin valve Hall resistance AlcGa1¡cAs parabolic wells We report observation of the Hall slope change in wide AlcGa1¡cAs parabolic wells in the presence of aquasi-parallel magnetic field. Above the critical magnetic field B>4T, the Hall resistance becomes temperaturedependent and can be described by equation Rxy=cosQ » (B¡B0)=ens, where ns is the electron density, B0=2-2.6 T and Q is the angle between magnetic field and the normal to the well plane. The effect strongly dependson the electron density; it is observed only in parabolic wells, which are almost completely filled by electrons.We attribute the Hall slope change to the unusual behaviour of the effective g f actor in such parabolic well,which depends on the Al composition and changes the sign along the well width. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436368 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.36 |
| title | Spin Valve Effect and Hall Resistance in a Wide Parabolic Well |
| topic | Física, Astronomía y Matemáticas Spin valve Hall resistance AlcGa1¡cAs parabolic wells |
| url | https://www.redalyc.org/articulo.oa?id=46436368 |