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Peralta-Ramos, J.; Llois, A.M.; Rungger, I.; Sanvito, S. "I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions" (2008) Physical Review B - Condensed Matter and Materials Physics. 78(2)
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Abstract:

In this work, we calculate with ab initio methods the current-voltage characteristics for ideal single- and double-barrier Fe/MgO (001) magnetic tunnel junctions. The current is calculated in the phase-coherent limit by using the recently developed SMEAGOL code, combining the nonequilibrium Green function formalism with density-functional theory. In general we find that double-barrier junctions display a larger magnetoresistance, which decays with bias at a slower pace than their single-barrier counterparts. This is explained in terms of enhanced spin filtering from the middle Fe layer sandwiched in between the two MgO barriers. In addition, for double-barrier tunnel junctions, we find a well defined peak in the magnetoresistance at a voltage of V=0.1 V. This is the signature of resonant tunneling across a majority quantum well state. Our findings are discussed in relation to recent experiments. © 2008 The American Physical Society.

Registro:

Documento: Artículo
Título:I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions
Autor:Peralta-Ramos, J.; Llois, A.M.; Rungger, I.; Sanvito, S.
Filiación:Departamento de Física, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
Departamento de Física, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
School of Physics and CRANN, Trinity College, Dublin 2, Ireland
Año:2008
Volumen:78
Número:2
DOI: http://dx.doi.org/10.1103/PhysRevB.78.024430
Título revista:Physical Review B - Condensed Matter and Materials Physics
Título revista abreviado:Phys. Rev. B Condens. Matter Mater. Phys.
ISSN:10980121
CODEN:PRBMD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v78_n2_p_PeraltaRamos

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Citas:

---------- APA ----------
Peralta-Ramos, J., Llois, A.M., Rungger, I. & Sanvito, S. (2008) . I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions. Physical Review B - Condensed Matter and Materials Physics, 78(2).
http://dx.doi.org/10.1103/PhysRevB.78.024430
---------- CHICAGO ----------
Peralta-Ramos, J., Llois, A.M., Rungger, I., Sanvito, S. "I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions" . Physical Review B - Condensed Matter and Materials Physics 78, no. 2 (2008).
http://dx.doi.org/10.1103/PhysRevB.78.024430
---------- MLA ----------
Peralta-Ramos, J., Llois, A.M., Rungger, I., Sanvito, S. "I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions" . Physical Review B - Condensed Matter and Materials Physics, vol. 78, no. 2, 2008.
http://dx.doi.org/10.1103/PhysRevB.78.024430
---------- VANCOUVER ----------
Peralta-Ramos, J., Llois, A.M., Rungger, I., Sanvito, S. I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions. Phys. Rev. B Condens. Matter Mater. Phys. 2008;78(2).
http://dx.doi.org/10.1103/PhysRevB.78.024430