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A new theory of doped manganites exhibiting colossal magnetoresistance

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Abstract

Rare earth manganites doped with alkaline earths, namely Re1-xAxMnO3, exhibit colossal magnetoresistance, metal insulator transitions, competing magnetic, orbital and charge ordering, and many other interesting but poorly understood phenomena. In this article I outline our recent theory based on the idea that in the presence of strong Jahn-Teller, Coulomb and Hund’s couplings present in these materials, the low-energy electronic states dynamically reorganize themselves into two sets: one set (ℓ) which are polaronic, i.e., localized and accompanied by large local lattice distortion, and another (b) which are non-polaronic and band-like. The coexistence of the radically different ℓ andb states, and the sensitive dependence of their relative energies and occupation upon dopingx, temperatureT, magnetic fieldH, etc., underlies the unique effects seen in manganites. I present results from strong correlation calculations using dynamical mean-field theory and simulations on a new 2-fluid model which accord with a variety of observations.

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References

  1. S Jinet al, Science 264, 413 (1994)

    Article  ADS  Google Scholar 

  2. C N R Rao and B Raveau (eds),Colossal magnetoresistance, charge ordering and related properties of manganese oxides (World Scientific, Singapore, 1998)

    Google Scholar 

  3. Y Tokura (ed.),Colossal magnetoresistance oxides (Gordon and Breach, New York, 2000)

    Google Scholar 

  4. C N R Rao, Anthony Arulraj, A K Cheetham and B Raveau,J. Phys. Condens. Matter 12, R83 (2000)

    Article  ADS  Google Scholar 

  5. M B Salamon and M Jaime,Rev. Mod. Phys. 73, 583 (2001)

    Article  ADS  Google Scholar 

  6. E Dagotto, T Hotta and A Moreo,Phys. Rep. 344, 1 (2001)

    Article  ADS  Google Scholar 

  7. Neil Mathur and Peter Littlewood,Phys. Today 56, 25 (2003)

    Article  ADS  Google Scholar 

  8. H Y Hwanget al, Phys. Rev. Lett. 75, 914 (1995)

    Article  ADS  Google Scholar 

  9. J P Attfield,Chemistry of Materials 10, 3239 (1998)

    Article  Google Scholar 

  10. N A Babushkinaet al, Nature (London) 391, 159 (1998)

    Article  ADS  Google Scholar 

  11. M Uehara, S Mori, C M Chen and S W Cheong,Nature (London) 399, 560 (1999)

    Article  ADS  Google Scholar 

  12. D Loucaet al, Phys. Rev. B56, R8475 (1997)

    ADS  Google Scholar 

  13. T Egami, inStructure and bonding edited by J B Goodenough, Vol. 98, p. 115 (2001)

  14. C Meneghiniet al, J Phys. Condens. Matter. 14, 1967 (2002)

    Article  ADS  Google Scholar 

  15. R H Heffneret al, Phys. Rev. Lett. 85, 3285 (2000)

    Article  ADS  Google Scholar 

  16. M Fäthet al, Science 285, 1540 (1999)

    Article  Google Scholar 

  17. M Uehara, K H Kim and S W Cheong, private communication

  18. S Satpathy, Z S Popovic and F R Vukajlovic,Phys. Rev. Lett. 76, 960 (1996)

    Article  ADS  Google Scholar 

  19. D D Sarmaet al, Phys. Rev. Lett. 75, 1126 (1995)

    Article  ADS  Google Scholar 

  20. A J Millis,Philos. Trans. R. Soc. London Ser. A 356, 1473 (1998)

    ADS  Google Scholar 

  21. J Kanamori,J. Appl. Phys. 31, 14S (1960)

    Article  ADS  Google Scholar 

  22. N Furukawa,J. Phys. Soc. Jpn. 64, 2734 (1995)

    Article  ADS  Google Scholar 

  23. A J Millis, R Mueller and B I Shraiman,Phys. Rev. B54, 5405 (1996)

    ADS  Google Scholar 

  24. A C M Green and D M Edwards,J. Magn. Magn. Mater. 226, 886 (2001)

    Article  ADS  Google Scholar 

  25. H Roder, Jun Zang and A R Bishop,Phys. Rev. Lett. 76, 1356 (1996)

    Article  ADS  Google Scholar 

  26. T V Ramakrishnan, H R Krishnamurthy, S R Hassan and G Venketeswera Pai,Phys. Rev. Lett. 92, 157203 (2004), cond-matt/0308376

    Article  ADS  Google Scholar 

  27. G Venketeswera Pai, S R Hassan, H R Krishnamurthy and T V Ramakrishnan,Europhys. Lett. 64, 696 (2003), cond-matt/0309493

    Article  ADS  Google Scholar 

  28. T V Ramakrishnan, H R Krishnamurthy, S R Hassan and G Venketeswera Pai, cond-matt/0308396, appeared as a chapter inColossal Magnetoresistive Manganites edited by T Chatterji (Kluwer Academic Publishers, Dordrecht, Netherlands)

  29. O Cepas, H R Krishnamurthy and T V Ramakrishnan,Phys. Rev. Lett. (in press) cond-mat/0412651, and to be published

  30. Vijay B Shenoy, Tribikram Gupta, H R Krishnamurthy and T V Ramakrishnan (to be published)

  31. T Mizokawa, D I Khomskii and G A Sawatzky,Phys. Rev. B63, 024403 (2001)

    ADS  Google Scholar 

  32. See also A J Millis,Phys. Rev. B55, 6405 (1997)

    ADS  Google Scholar 

  33. L M Falicov and J C Kimball,Phys. Rev. Lett. 22, 997 (1969)

    Article  ADS  Google Scholar 

  34. A Georges, G Kotliar, W Krauth and M J Rozenberg,Rev. Mod. Phys. 68, 13 (1996)

    Article  ADS  MathSciNet  Google Scholar 

  35. P Daiet al, Phys. Rev. B61, 9553 (2000)

    ADS  Google Scholar 

  36. J J Neumeier, M F Hundley, J D Thompson and R H Heffner,Phys. Rev. B52, R7006 (1995)

    ADS  Google Scholar 

  37. Y Okimotoet al, Phys. Rev. B55, 4206 (1997)

    ADS  Google Scholar 

  38. A Maignan, C Martin, F Damay and B Raveau,Phys. Rev. B58, 2758 (1998)

    ADS  Google Scholar 

  39. For e.g., see G M Zhaoet al, Phys. Rev. B63, 060402 (2001)

    ADS  Google Scholar 

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Authors and Affiliations

  1. Department of Physics, Centre for Condensed Matter Theory, Indian Institute of Science, 560 012, Bangalore, India

    H R Krishnamurthy

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  1. H R Krishnamurthy
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Krishnamurthy, H.R. A new theory of doped manganites exhibiting colossal magnetoresistance. Pramana - J Phys 64, 1063–1074 (2005). https://doi.org/10.1007/BF02704168

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