Resistivity of mixed-phase manganites

Physical Review Letters

Volumn 86, Issue 1, 2001, Pages 135-138

  Mayr, Matthias ^a   Moreo, Adriana ^a   Vergés, Jose A ^b   Arispe, Jeanette ^a   Feiguin, Adrian ^a   Dagotto, Elbio ^a  

^a FLORIDA STATE UNIVERSITY   (United States)

^b INSTITUTO DE CIENCIA DE MATERIALES DE MADRID   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

CALCULATIONS; COLOSSAL MAGNETORESISTANCE; COMPOSITION; ELECTRIC CONDUCTIVITY; FERROMAGNETISM; MAGNETIC FIELDS; PHASE SEPARATION; QUANTUM THEORY;

BAD METAL STATE; MANGANITE;

MANGANESE COMPOUNDS;

EID: 0035121219     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.86.135     Document Type: Article

References (33)

1. Y. Tokura and N. Nagaosa, Science 288, 462 (2000); E. Dagotto et al., Phys. Rep. (to be published).
2. Y. Tokura and N. Nagaosa, Science 288, 462 (2000); E. Dagotto et al., Phys. Rep. (to be published).
3. M. Uehara et al., Nature (London) 399, 560 (1999); see also M. Ibarra and J. De Teresa, J. Magn. Magn. Mater. 177-181, 846 (1998); D. Louca and T. Egami, Phys. Rev. B 59, 6193 (1999).
4. M. Uehara et al., Nature (London) 399, 560 (1999); see also M. Ibarra and J. De Teresa, J. Magn. Magn. Mater. 177-181, 846 (1998); D. Louca and T. Egami, Phys. Rev. B 59, 6193 (1999).
5. M. Uehara et al., Nature (London) 399, 560 (1999); see also M. Ibarra and J. De Teresa, J. Magn. Magn. Mater. 177-181, 846 (1998); D. Louca and T. Egami, Phys. Rev. B 59, 6193 (1999).
6. A. Moreo et al., Science 283, 2034 (1999); S. Yunoki et al., Phys. Rev. Lett. 80, 845 (1998). For analogous ideas in doped AF semiconductors, see E. L. Nagaev, JETP Lett. 16, 558 (1972); V. A. Kashin and E. L. Nagaev, Sov. Phys. JETP 39, 1036 (1974).
7. A. Moreo et al., Science 283, 2034 (1999); S. Yunoki et al., Phys. Rev. Lett. 80, 845 (1998). For analogous ideas in doped AF semiconductors, see E. L. Nagaev, JETP Lett. 16, 558 (1972); V. A. Kashin and E. L. Nagaev, Sov. Phys. JETP 39, 1036 (1974).
8. A. Moreo et al., Science 283, 2034 (1999); S. Yunoki et al., Phys. Rev. Lett. 80, 845 (1998). For analogous ideas in doped AF semiconductors, see E. L. Nagaev, JETP Lett. 16, 558 (1972); V. A. Kashin and E. L. Nagaev, Sov. Phys. JETP 39, 1036 (1974).
9. A. Moreo et al., Science 283, 2034 (1999); S. Yunoki et al., Phys. Rev. Lett. 80, 845 (1998). For analogous ideas in doped AF semiconductors, see E. L. Nagaev, JETP Lett. 16, 558 (1972); V. A. Kashin and E. L. Nagaev, Sov. Phys. JETP 39, 1036 (1974).
10. S. Yunoki et al., Phys. Rev. Lett. 81, 5612 (1998); 84, 3714 (2000); T. Hotta et al., ibid. 84, 2477 (2000); J. van den Brink et al., ibid. 83, 5118 (1999).
11. S. Yunoki et al., Phys. Rev. Lett. 81, 5612 (1998); 84, 3714 (2000); T. Hotta et al., ibid. 84, 2477 (2000); J. van den Brink et al., ibid. 83, 5118 (1999).
12. S. Yunoki et al., Phys. Rev. Lett. 81, 5612 (1998); 84, 3714 (2000); T. Hotta et al., ibid. 84, 2477 (2000); J. van den Brink et al., ibid. 83, 5118 (1999).
13. S. Yunoki et al., Phys. Rev. Lett. 81, 5612 (1998); 84, 3714 (2000); T. Hotta et al., ibid. 84, 2477 (2000); J. van den Brink et al., ibid. 83, 5118 (1999).
14. A. Moreo et al., Phys. Rev. Lett. 84, 5568 (2000).
15. 3 is not due to Anderson localization.
16. 3 is not due to Anderson localization.
17. S. Kirkpatrick, Rev. Mod. Phys. 45, 574 (1973).
18. For a similar approach, see K. H. Kim et al., Phys. Rev. Lett. 84, 2961 (2000). For studies of impurity conduction, see A. Miller and E. Abrahams, Phys. Rev. 120, 745 (1960).
19. For a similar approach, see K. H. Kim et al., Phys. Rev. Lett. 84, 2961 (2000). For studies of impurity conduction, see A. Miller and E. Abrahams, Phys. Rev. 120, 745 (1960).
20. l = ∞.
21. R. Mathieu et al., cond-mat/0007154.
22. S. Kawasaki et al., J. Phys. Soc. Jpn. 67, 1529 (1998).
23. "Percolative" configurations are rare in small clusters.
24. Y. Avishai and J. M. Luck, Phys. Rev. B 45, 1074 (1992).
25. J. A. Vergés, cond-mat/9905235; M. Calderon, J. Vergés, and L. Brey, Phys. Rev. B 59, 4170 (1999).
26. J. A. Vergés, cond-mat/9905235; M. Calderon, J. Vergés, and L. Brey, Phys. Rev. B 59, 4170 (1999).
27. The finite clusters arc connected to semi-infinite leads using an infinitesimal voltage drop. The self-energy of these leads is known, and C is evaluated using known formulas
28. Since this is quantum percolation, the study is only in 3D (2D localization leads to zero conductivity).
29. It was verified by a finite-size-scaling analysis that the conductances shown in Fig. 3a are in the Ohmic regime.
30. Similar results were obtained using the two-orbital model [4] in one dimension, near a FM-AF transition [5].
31. Our approach also applies to large MR nonmanganite materials, such as the Eu-based compounds [S. Yoon et al., Phys. Rev. B 58, 2795 (1998); E. L. Nagaev, Physics of Magnetic Semiconductors [Mir, Moscow, 1983]; A. Mauger and D. L. Mills, Phys. Rev. Lett. 53, 1594 (1984)].
32. Our approach also applies to large MR nonmanganite materials, such as the Eu-based compounds [S. Yoon et al., Phys. Rev. B 58, 2795 (1998); E. L. Nagaev, Physics of Magnetic Semiconductors [Mir, Moscow, 1983]; A. Mauger and D. L. Mills, Phys. Rev. Lett. 53, 1594 (1984)].
33. Our approach also applies to large MR nonmanganite materials, such as the Eu-based compounds [S. Yoon et al., Phys. Rev. B 58, 2795 (1998); E. L. Nagaev, Physics of Magnetic Semiconductors [Mir, Moscow, 1983]; A. Mauger and D. L. Mills, Phys. Rev. Lett. 53, 1594 (1984)].