Orbital-driven Variation of Electronic Structures in Tetragonal La 1/2Sr1/2MnO3 as Investigated by Optical Spectroscopy

Journal of the Physical Society of Japan

Volumn 71, Issue 2, 2002, Pages 613-617

  Okimoto, Yoichi ^a   Konishi, Yoshinori ^a   Izumi, Makoto ^a   Manako, Takashi ^a   Kawasaki, Masashi ^a,b,c   Tokura, Yoshinori ^a,b,d  

^a JT RES CENTER FOR ATOM TECHNOLOGY   (Japan)

^b NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY AIST   (Japan)

^c TOHOKU UNIVERSITY   (Japan)

^d UNIVERSITY OF TOKYO   (Japan)

Author keywords

Colossal magnetoresistance; Optical conductivity; Orbital ordering

Indexed keywords

LANTHANUM; MAGNESIUM OXIDE; METAL; STRONTIUM;

ARTICLE; CHIRALITY; ELECTRIC RESISTANCE; FILM; MAGNETIC FIELD; REACTION ANALYSIS; SPECTROSCOPY; STRUCTURE ANALYSIS;

EID: 0036256018     PISSN: 00319015     EISSN: None     Source Type: Journal    
DOI: 10.1143/JPSJ.71.613     Document Type: Article

References (47)

1. For reference, Colossal Magnetoresistive Oxides, ed. Y. Tokura (Gordon and Breach Science Publishers, 2000).
2. C. Zener: Phys. Rev. B 82 (1951) 403; P. W. Anderson and H. Hasegawa: ibid. 100 (1955) 675; P.-G. de Gennes: ibid. 118 (1960) 141.
3. C. Zener: Phys. Rev. B 82 (1951) 403; P. W. Anderson and H. Hasegawa: ibid. 100 (1955) 675; P.-G. de Gennes: ibid. 118 (1960) 141.
4. C. Zener: Phys. Rev. B 82 (1951) 403; P. W. Anderson and H. Hasegawa: ibid. 100 (1955) 675; P.-G. de Gennes: ibid. 118 (1960) 141.
5. H. Kawano, R. Kajimoto, H. Yoshizawa, Y. Tomioka, H. Kuwahara and Y. Tokura: Phys. Rev. Lett. 78 (1997) 4253.
6. A. Llobet, J. L. Garcia-Munoz, C. Frontera and C. Ritter: Phys. Rev. B 60 (1999) R9889.
7. Z. Jirak, S. Krupicka, Z. Simsa, M. Dlouha and Z. Vlatislav: J. Magn. & Magn. Mater. 53 (1985) 153.
8. M. v. Zimmermann, J. P. Hill, D. Gibbs, M. Blume, D. Casa, B. Keimer, Y. Murakami, Y. Tomioka and Y. Tokura: Phys. Rev. Lett. 83 (1999) 4872.
9. H. Kuwahara, T. Okuda, Y. Tomoika, T. Kimura, A. Asamitsu and Y. Tokura: Mater. Res. Soc. Symp. Proc. 494 (1998) 83.
10. R. Kajimoto, H. Yoshizawa, H. Kawano H. Kuwahara, Y. Tokura, K. Ohoyama and M. Ohashi: Phys. Rev. B 60 (1999) 9506.
11. Y. Okimoto, Y. Tomioka, Y. Onose, Y. Otsuka and Y. Tokura: Phys. Rev. B 57 (1998) R9377; ibid. 59 (1999) 7401.
12. Y. Okimoto, Y. Tomioka, Y. Onose, Y. Otsuka and Y. Tokura: Phys. Rev. B 57 (1998) R9377; ibid. 59 (1999) 7401.
13. H. Kuwahara, T. Okuda, Y. Tomioka, A. Asamitsu and Y. Tokura: Phys. Rev. Lett. 82 (1999) 4316.
14. E. Saitoh, Y. Tomioka, T. Kimura and Y. Tokura: J. Phys. Soc. Jpn. 69 (2000) 2403.
15. M. Rubhausen, S. Yoon, S. L. Cooper, K. H. Kim and S.-W. Cheong: Phys. Rev. B 62 (2000) R4782.
16. x2-y2 orbital ordering has recently been done by J. H. Jung et al. [Phys. Rev. B 62 (2000) 8634], but the sample they investigated was not detwinned.
17. T. Y. Koo, S. H. Park, K.-B. Lee and Y. H. Jeong: Appl. Phys. Lett. 71 (1997) 977.
18. N.-C. Yeh, R. P. Vasquez, D. A. Beam, C.-C. Fu, J. Huynh and G. Beach: J. Phys.: Condens. Matter 9 (1997) 3713.
19. Y. Suzuki, H. Y. Hwang, S.-W. Cheong and R. B. van Dover: Appl. Phys. Lett. 71 (1997) 140.
20. A. J. Millis, T. Darling and A. Migliori: J. Appl. Phys. 83 (1998) 1588.
21. H. L. Ju, K. M. Krishnan and D. Lederman: J. Appl. Phys. 83 (1998) 7073.
22. Y. Konishi, Z. Fang, M. Izumi, T. Manako, M. Kasai, H. Kuwahara, M. Kawasaki and Y. Tokura: J. Phys. Soc. Jpn. 68 (1999) 3790.
23. Z. Fang, I. V. Solovyev and K. Terakura: Phys. Rev. Lett. 84 (2000) 3169.
24. x2-y2 orbital ordering for the film on STO has been recently confirmed by Kiyama et al. in terms of resonant x-ray scattering21)
25. T. Kiyama, Y. Murakami, Y. Konishi, M. Kawasaki and Y. Tokura: unpublished.
26. For example, T. Kimura and Y. Tokura: Annu. Rev. Mater. Sci. 30 (2000) 451.
27. O. S. Heavens: Optical properties of thin solid films (Dover, New York, 1991).
28. P. O. Nilsson: Appl. Opt. 7 (1968) 435.
29. In the calcuration, a thickness value of a thin film is needed. However, we cannot estimate the exact value, so we chose a thickness of a thin film (≈680 Å) so that the calculation could converge in the whole photon energy region.
30. The optical spectrum in the mid-infrared region is sensitive to inhomogeneity of a thin film (refs. 28 and 29). The thin films were confirmed to be atomically flat by an atomic force microscope and spectroscopically homogeneous by microscope spectroscopy with a spatial resolution of 50 μm.
31. S. G. Kaplan, M. Quijada, H. D. Drew, D. B. Tanner, G. C. Xiong, R. Ramesh, C. Won and T. Venkatesan: Phys. Rev. Lett. 77 (1996) 2081.
32. M. Quijada, J. Cerne, J. R. Simpson, H. D. Drew, K. H. Ahn, A. J. Millis, R. Shreekara, R. Ramesh, M. Rajeswari and T. Venkatesan: Phys. Rev. B 58 (1998) 16093.
33. Y. Okimoto, T. Katsufuji, A. Urushibara, T. Arima and Y. Tokura: Phys. Rev. Lett. 75 (1995) 109; Phys. Rev. B 55 (1997) 4206.
34. Y. Okimoto, T. Katsufuji, A. Urushibara, T. Arima and Y. Tokura: Phys. Rev. Lett. 75 (1995) 109; Phys. Rev. B 55 (1997) 4206.
35. K. H. Kim, J. H. Jung and T. W. Noh: Phys. Rev. Lett. 81 (1998) 1517.
36. J. R. Simpson, H. D. Drew, V. N. Smolyaninova, R. L. Greene, M. C. Robson, A. Biswas and M. Rajeswari: Phys. Rev. B 60 (1999) R16263.
37. I. V. Solovyev: to be published in Fiz. Met. Metalloved.
38. H. Shiba, R. Siina and A. Takahashi: J. Phys. Soc. Jpn. 66 (1997) 941.
39. eff based on the band structure calculations will be presented separately by I. V. Solovyev.
40. S. Ishihara, M. Yamanaka and N. Nagaosa: Phys. Rev. B 56 (1997) 686.
41. P. E. Brito and H. Shiba: Phys. Rev. B 57 (1998) 1539.
42. S. Yunoki, A. Moreo and E. Dagotto: Phys. Rev. Lett. 81 (1998) 5612.
43. H. Nakano, Y. Motome and M. Imada: J. Phys. Soc. Jpn. 69 (2000) 1282.
44. M. Mack and P. Horsh: Phys. Rev. Lett. 82 (1999) 3160.
45. 3z2-r2 band (AA) is roughly comparable to the LDA+U band calculation by Fujiwara and Korotin [Phys. Rev. B 59 (1999) 9903].
46. T. Mizokawa and A. Fujimori: Phys. Rev. B 56 (1997) R493.
47. A. J. Millis, P. B. Littlewood and B. I. Shraiman: Phys. Rev. B 54 (1996) 5405.