J. Phys. Soc. Jpn. 73 (2004) pp. 3413-3417  |Next Article|  |Table of Contents|
|Full Text PDF (159K)| |Buy This Article|

Neutron Scattering Study of Soft Phonons and Diffuse Scattering in Insulating La_1.95Sr_0.05CuO₄

Shuichi Wakimoto, Seunghun Lee¹, Peter M. Gehring¹, Robert J. Birgeneau and Gen Shirane²

(Received August 25, 2004)

Soft phonons and diffuse scattering in insulating La_2-xSr_xCuO₄ (x=0.05) have been studied by the neutron scattering technique. The X-point phonon softens from high temperature towards the structural transition temperature T_s=410 K, and the Z-point phonon softens again below 200 K. The Z-point phonon softening persists to low temperature, in contrast to the behavior observed in the superconducting x=0.15 compound, in which the Z-point phonon hardens below T_c. The diffuse scattering associated with the structural phase transition at 410 K appears at commensurate positions. These results highlight interesting differences between superconducting and insulating samples. ©2004 The Physical Society of Japan

KEYWORDS: La_2-xSr_xCuO₄, neutron scattering, soft phonon, diffuse scattering
URL: http://jpsj.ipap.jp/link?JPSJ/73/3413/
DOI: 10.1143/JPSJ.73.3413

References | Citing Articles (3)

1. J. D. Axe and G. Shirane: Phys. Rev. Lett. 30 (1973) 214[APS].
2. S. M. Shapiro, G. Shirane and J. D. Axe: Phys. Rev. B 12 (1975) 4899[APS].
3. M. Nohara, T. Suzuki, Y. Maeno, T. Fujita, I. Tanaka and H. Kojima: Phys. Rev. Lett. 70 (1993) 3447[APS].
4. C.-H. Lee, K. Yamada, M. Arai, S. Wakimoto, S. Hosoya and Y. Endoh: Physica C 257 (1996) 264[CrossRef].
5. H. Kimura, K. Hirota, C.-H. Lee, K. Yamada and G. Shirane: J. Phys. Soc. Jpn. 69 (2000) 851[IPAP].
6. R. J. Birgeneau, C. Y. Chen, D. R. Gabbe, H. P. Jenssen, M. A. Kastner, C. J. Peters, P. J. Picone, T. Thio, T. R. Thurston and H. L. Tuller: Phys. Rev. Lett. 59 (1987) 1329[APS].
7. P. Böni, J. D. Axe, G. Shirane, R. J. Birgeneau, D. R. Gabbe, H. P. Jenssen, M. A. Kastner, C. J. Peters, P. J. Picone and T. R. Thurston: Phys. Rev. B 38 (1988) 185[APS].
8. T. R. Thurston, R. J. Birgeneau, D. R. Gabbe, H. P. Jenssen, M. A. Kastner, P. J. Picone, N. W. Preyer, J. D. Axe, P. Böni, G. Shirane, M. Sato, K. Fukuda and S. Shamoto: Phys. Rev. B 39 (1989) 4327[APS].
9. S. Hosoya, C. H. Lee, S. Wakimoto, K. Yamada and Y. Endoh: Physica C 235–240 (1994) 547[CrossRef].
10. C. H. Lee, N. Kaneko, S. Hosoya, K. Kurahashi, S. Wakimoto, K. Yamada and Y. Endoh: Supercond. Sci. Technol. 11 (1998) 891[IoP STACKS].
11. S. Wakimoto, G. Shirane, Y. Endoh, K. Hirota, S. Ueki, K. Yamada, R. J. Birgeneau, M. A. Kastner, Y. S. Lee, P. M. Gehring and S. H. Lee: Phys. Rev. B 60 (1999) R769[APS].
12. S. Wakimoto, R. J. Birgeneau, M. A. Kastner, Y. S. Lee, R. Erwin, P. M. Gehring, S. H. Lee, M. Fujita, K. Yamada, Y. Endoh, K. Hirota and G. Shirane: Phys. Rev. B 61 (2000) 3699[APS].
13. B. Keimer, N. Belk, R. J. Birgeneau, A. Cassanho, C. Y. Chen, M. Greven, M. A. Kastner, A. Aharony, Y. Endoh, R. W. Erwin and G. Shirane: Phys. Rev. B 46 (1992) 14034[APS].
14. H. Takagi, R. J. Cava, M. Marezio, B. Batlogg, J. J. Krajewski, W. F. Peck, Jr., P. Bordet and D. E. Cox: Phys. Rev. Lett. 68 (1992) 3777[APS].
15. T. Suzuki, T. Goto, K. Chiba, T. Shinoda, T. Fukase, H. Kimura, K. Yamada, M. Ohashi and Y. Yamaguchi: Phys. Rev. B 57 (1998) 3229[APS].
16. H. Kimura, K. Hirota, H. Matsushita, K. Yamada, Y. Endoh, S.-H. Lee, C. F. Majkrzak, R. Erwin, G. Shirane, M. Greven, Y. S. Lee, M. A. Kastner and R. J. Birgeneau: Phys. Rev. B 59 (1999) 6517[APS].
17. K. Yamada, C. H. Lee, K. Kurahashi, S. Wakimoto, S. Ueki, H. Kimura, Y. Endoh, S. Hosoya, G. Shirane, R. J. Birgeneau, M. Greven, M. A. Kastner and Y. J. Kim: Phys. Rev. B 57 (1998) 6165[APS].
18. A. W. Hunt, P. M. Singer, K. R. Thurber and T. Imai: Phys. Rev. Lett. 82 (1999) 4300[APS].
19. S. Komiya and Y. Ando: Phys. Rev. B 70 (2004) 060503[APS].