Gate-controlled spin splitting in quantum dots with ferromagnetic leads in the Kondo regime

Physical Review B - Condensed Matter and Materials Physics

Volumn 72, Issue 12, 2005, Pages

  Martinek, J ^a,c,f   Sindel, M ^b   Borda, L ^b,d   Barnas J ^c,e   Bulla, R ^g   Konig J ^h   Schon G ^a   Maekawa, S ^f   Von Delft, J ^b  

^a UNIVERSITY OF KARLSRUHE   (Germany)

^b UNIVERSITY OF MUNICH   (Germany)

^c INSTITUTE OF MOLECULAR PHYSICS   (Poland)

^d TU Institute of Building Constructions and Sanitary Engineering Budapest   (Hungary)

^e ADAM MICKIEWICZ UNIVERSITY   (Poland)

^f TOHOKU UNIVERSITY   (Japan)

^g UNIVERSITY OF AUGSBURG   (Germany)

^h RUHR UNIVERSITY BOCHUM   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 29744461977     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.72.121302     Document Type: Article

References (23)

1. S. Maekawa and T. Shinjo, Spin Dependent Transport in Magnetic Nanostructures (Taylor & Francis, London, 2002).
2. H. Ohno, D. Chiba, F. Matsukura, T. Omiya, E. Abe, T. Dietl, Y. Ohno, and K. Ohtani, Nature (London) NATUAS 0028-0836 10.1038/35050040 408, 944 (2000);
3. D. Chiba, M. Yamanouchi, F. Matsukura, and H. Ohno, Science SCIEAS 0036-8075 10.1126/science.1086608 301, 943 (2003).
4. N. Sergueev, Q. F. Sun, H. Guo, B. G. Wang, and J. Wang, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.65.165303 65, 165303 (2002).
5. P. Zhang, Q. K. Xue, Y. Wang, and X. C. Xie, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.89.286803 89, 286803 (2002).
6. B. R. Bułka and S. Lipinski, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.67.024404 67, 024404 (2003).
7. R. Lopez, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.90.116602 90, 116602 (2003).
8. J. Martinek, Y. Utsumi, H. Imamura, J. Barnás, S. Maekawa, J. König, and G. Schön, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.91.127203 91, 127203 (2003).
9. J. Martinek, M. Sindel, L. Borda, J. Barnás, J. König, G. Schön, and J. von Delft, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.91.247202 91, 247202 (2003).
10. In M. S. Choi, D. Sanchez, and R. Lopez, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.92.056601 92, 056601 (2004), among other results the Vg dependence of a QD coupled to ferromagnetic leads with a flat (p-h symmetric) DOS has been presented. However, the role of charge fluctuations in the absence of a spin splitting, a sign change, and a logarithmic divergence in the spin splitting went unnoticed.
11. A. Pasupathy, R. C. Bialczak, J. Martinek, J. E. Grose, L. A. K. Donev, P. L. McEuen, and D. C. Ralph, Science SCIEAS 0036-8075 10.1126/science.1102068 306, 86 (2004).
12. K. G. Wilson, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.47.773 47, 773 (1975);
13. T. A. Costi, A. C. Hewson, and V. Zlatic, J. Phys.: Condens. Matter JCOMEL 0953-8984 10.1088/0953-8984/6/13/013 6, 2519 (1994).
14. A. C. Hewson, The Kondo Problem to Heavy Fermions (Cambridge University Press, Cambridge, England, 1993).
15. R. Bulla, Th. Pruschke, and A. C. Hewson, J. Phys.: Condens. Matter JCOMEL 0953-8984 10.1088/0953-8984/9/47/014 9, 10463 (1997).
16. For more details, see R. Bulla, H.-J. Lee, N.-H. Tong, and M. Vojta, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.71.045122 71, 045122 (2005).
17. K. Yosida, Theory of Magnetism (Springer, Berlin, 1996).
18. This value is typical for ferromagnetic metals like Ni [Handbook of the Band Structure of Elemental Solids, edited by, D. A. Papaconstantopoulos, (Plenum, New York, 1986)].
19. J. Nygård, W. F. Koehl, N. Mason, L. DiCarlo, and C. M. Marcus, cond-mat/0410467 (unpublished).
20. S. Sasaki, S. De Franceschi, J. M. Elzerman, W. G. van der Wiel, M. Eto, S. Tarucha, and L. P. Kouwenhoven, Nature (London) NATUAS 0028-0836 10.1038/35015509 405, 764 (2000).
21. D. Boese, W. Hofstetter, and H. Schoeller, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.64.125309 64, 125309 (2001).
22. F. D. M. Haldane, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett. 40.416 40, 416 (1978).
23. This spin splitting corresponds to the exchange filed leading to spin precession in a quantum spin valve, see J. König and J. Martinek, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.90.166602 90, 166602 (2003).