Spin filtering and magnetoresistance in ballistic tunnel junctions

Physical Review B - Condensed Matter and Materials Physics

Volumn 64, Issue 19, 2001, Pages

  Egues, J C ^a   Gould, C ^b   Richter, G ^b   Molenkamp, L W ^b  

^a UNIVERSITY OF SÃO PAULO   (Brazil)

^b UNIVERSITY OF WÜRZBURG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

ACCELERATION; ARTICLE; ELECTRON TRANSPORT; MAGNETISM; MATHEMATICAL ANALYSIS; MOLECULAR MODEL; QUANTUM MECHANICS; SEMICONDUCTOR; STRUCTURE ANALYSIS;

EID: 0035891037     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.64.195319     Document Type: Article

References (19)

1. R. Fiederling, Nature (London)402, 787 (1999).
2. Y. Ohno, Nature (London)402, 790 (1999).
3. B T. Jonker, Phys. Rev. B62, 8180 (2000).
4. G. Prinz, Science282, 1660 (1998).
5. G. Burkard, Fortschr. Phys.48, 965 (2000).
6. M. Oestreich, Appl. Phys. Lett.74, 1251 (1999).
7. G. Schmidt(unpublished).
8. J C. Egues, Phys. Rev. Lett.80, 4578 (1998);
9. see also Y. Guo, Phys. Rev. B55, 9314 (1997), for transport in asymmetric multiple-barrier magnetic nanostructures (wave-vector filtering).
10. Spin filtering and MR in the context of metallic multilayers is discussed by M S. Ferreira, J. Phys.: Condens. Matter12, L373 (2000);
11. D C. Worledge and T H. Geballe, J. Appl. Phys.88, 5277 (2000);
12. See also Wu-Shou Zhang, Phys. Rev. B58, 14 959 (1998).
13. K. Chang and F M. Peeters (unpublished).
14. We neglect Landau-level broadening; it is assumed much smaller than the relevant (formula presented) energy splitting.
15. As usual, we consider the electrons at (formula presented) (sharp Fermi function) and the paramagnetic impurities at (formula presented).
16. See, for instance, C. B. Duke, Tunneling in Solids, supplement to Solid State Physics (Academic, New York, 1960), Vol. 10, Chap. IV, p. 60.
17. The formulas for the conductances, magnetoresistance, and transmission coefficients for NMS-contacted structures are similar to those for the DMS-contacted ones. But now (formula presented) and (formula presented) (i.e., “∓” in the former definition of (formula presented) becomes “±” here).
18. See J J. Baumberg, Phys. Rev. Lett.72, 717 (1994) for beating in magneto-optics.
19. Detrimental effects (e.g., electron-electron interaction, band bending, etc.) and possible ways to minimize them are discussed in the paragraph “Important points” in Ref. 8.