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Journal of Superconductivity and Novel Magnetism

, Volume 26, Issue 4, pp 1325–1330 | Cite as

Lattice Effects Across the Phase Diagram of Pnictides

  • E. Liarokapis
  • A. Antonakos
  • N. D. Zhigadlo
  • S. Katrych
  • J. Karpinski
Original Paper

Abstract

We have studied by Raman spectroscopy the effect of doping, temperature, and hydrostatic pressure on selected Fe pnictides of the 1111 series. Two sets of RFeAsO1−x F x compounds have been examined (R=Sm and Nd) with a varying amount of doping and transition temperature. The doping dependence of the Raman active modes reveals that the rare earth phonon is correlated with the transition temperature (T c) and not with the amount of doping. As in the case of several other pnictides, the low temperature measurements indicate phonon modifications at much higher temperatures than T c even in the superconducting compounds. The application of hydrostatic pressure indicates a nonlinear behavior of the rare earth phonon, which increases with doping and in the superconducting compounds correlates with modifications in T c. The results are similar with those of the cuprates, where hydrostatic pressure has induced phonon and structure modifications at characteristic pressures where the T c dependence on pressure is also modified. All results point to some role of the lattice for superconductivity in the pnictides.

Keywords

Raman spectroscopy Pnictides Hydrostatic pressure 

References

  1. 1.
    Norman, M.R.: Physics 1, 21 (2008) CrossRefGoogle Scholar
  2. 2.
    Clarke, S.J., Adamson, P., Herkelrath, S.J.C., Rutt, O.J., Parker, D.R., Pitcher, M.J., Smura, C.F.: Inorg. Chem. 47, 8473 (2008) CrossRefGoogle Scholar
  3. 3.
    Chen, X.H., Wu, T., Wu, G., Liu, R.H., Chen, H., Fang, D.F.: Nature 453, 761 (2008) ADSCrossRefGoogle Scholar
  4. 4.
    Ren, Z.-A., Yang, J., Lu, W., Yi, W., Shen, X.-L., Li, Z.-C., Che, G.-C., Dong, X.-L., Sun, L.-L., Zhou, F., Zhao, Z.-X.: Europhys. Lett. 82, 57002 (2008) ADSCrossRefGoogle Scholar
  5. 5.
    Ren, Z.A., Che, G.C., Dong, X.L., Yang, J., Lu, W., Yi, W., Shen, X.L., Li, Z.C., Sun, L.L., Zhou, F., Zhao, Z.X.: Europhys. Lett. 83, 17002 (2008) ADSCrossRefGoogle Scholar
  6. 6.
    Dong, J., Zhang, H.J., Xu, G., Li, Z., Li, G., Hu, W.Z., Wu, D., Chen, G.F., Dai, X., Luo, J.L., Fang, Z., Wang, N.L.: Europhys. Lett. 83, 27006 (2008) ADSCrossRefGoogle Scholar
  7. 7.
    Cruz, C., Huang, Q., Lynn, J.W., Li, J.Y., Ratcliff, W. II, Zarestky, J.L., Mook, H.A., Chen, G.G., Luo, J.L., Wang, N.L., Dai, P.C.: Nature 453, 899 (2008) ADSCrossRefGoogle Scholar
  8. 8.
    Chauvière, L., Gallais, Y., Cazayous, M., Sacuto, A., Méasson, M.A., Colson, D., Forget, A.: Phys. Rev. B 80, 094504 (2009) ADSCrossRefGoogle Scholar
  9. 9.
    Rahlenbeck, M., Sun, G.L., Sun, D.L., Lin, C.T., Keimer, B., Ulrich, C.: Phys. Rev. B 80, 064509 (2009) ADSCrossRefGoogle Scholar
  10. 10.
    Kumar, P., Bera, A., Muthu, D.V.S., Kumar, A., Waghmare, U.V., Harnagea, L., Hess, C., Wurmeh, S., Singh, S., Buechner, B., Sood, A.K.: J. Phys. Condens. Matter 23, 255403 (2011) ADSCrossRefGoogle Scholar
  11. 11.
    Gallais, Y., Sacuto, A., Cazayous, M., Cheng, P., Fang, L., Wen, H.H.: Phys. Rev. B 78, 132509 (2008) ADSCrossRefGoogle Scholar
  12. 12.
    Siranidi, E., Lampakis, D., Liarokapis, E., Dohcevic-Mitrovic, Z., Paunovic, N., Popovic, Z.V., Zhao, Z.X.: J. Alloys Compd. 487, 430 (2009) CrossRefGoogle Scholar
  13. 13.
    Calamiotou, M., Margiolaki, I., Gantis, A., Siranidi, E., Ren, Z.A., Zhao, Z.X., Liarokapis, E.: Europhys. Lett. 91, 57005 (2010) ADSCrossRefGoogle Scholar
  14. 14.
    Fujishita, H., Hayashi, Y., Saito, M., Unno, H., Kaneko, H., Okamoto, H., Ohashi, M., Kobayashi, Y., Sato, M.: Eur. Phys. J. B 85, 52 (2012) ADSCrossRefGoogle Scholar
  15. 15.
    Schilling, J.: J. Phys. Chem. Solids 59, 553 (1998) ADSCrossRefGoogle Scholar
  16. 16.
    Takahashi, H., Okada, H., Kamihara, Y., Matsuishi, S., Hirano, M., Hosono, H., Matsubayashi, K., Uwatoko, Y.: J. Phys. Conf. Ser. 215, 012037 (2010) ADSCrossRefGoogle Scholar
  17. 17.
    Cu, C.W., Lorenz, B.: Physica C 469, 385 (2009) ADSCrossRefGoogle Scholar
  18. 18.
    Karpinski, J., Zhigadlo, N.D., Katrych, S., Bukowski, Z., Moll, P., Weyeneth, S., Keller, H., Puzniak, R., Tortello, M., Daghero, D., Gonnelli, R., Maggio-Aprile, I., Fasano, Y., Fischer, O., Rogacki, K., Batlogg, B.: Physica C 469, 370 (2009) ADSCrossRefGoogle Scholar
  19. 19.
    Garbarino, G., Weht, R., Sow, A., Sulpice, A., Toulemonde, P., Alvarez-Murga, M., Strobel, P., Bouvier, P., Mezouar, M., Nunez-Regueiro, M.: Phys. Rev. B 84, 024510 (2011) ADSCrossRefGoogle Scholar
  20. 20.
    Hadjiev, V.G., Iliev, M.N., Sasmal, K., Sun, Y.-Y., Chu, C.W.: Phys. Rev. B 77, 220505(R) (2008) ADSCrossRefGoogle Scholar
  21. 21.
    Liarokapis, E., Lampakis, D., Siranidi, E., Calamiotou, M.: J. Phys. Chem. Solids 71, 1084 (2010) ADSCrossRefGoogle Scholar
  22. 22.
    Calamiotou, M., Gantis, A., Siranidi, E., Lampakis, D., Karpinski, J., Liarokapis, E.: Phys. Rev. B 80, 214517 (2009) ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • E. Liarokapis
    • 1
  • A. Antonakos
    • 1
  • N. D. Zhigadlo
    • 2
  • S. Katrych
    • 2
  • J. Karpinski
    • 2
  1. 1.Department of PhysicsNational Technical University of AthensAthensGreece
  2. 2.Laboratory for Solid State PhysicsETH ZurichZurichSwitzerland

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