Elastic Instability of the Orthorhombic Antiferromagnetic Phase of 122-Pnictides Under Pressure

  • Michael Widom
  • Khandker Quader
Original Paper


A-122 pnictides (A an alkaline earth element) possess striped antiferromagnetic states of orthorhombic (OR) symmetry and nonmagnetic states of tetragonal (T) symmetry. Based on total energy calculations, we show that the T = 0 K pressure-driven transition from OR to T states occurs at a pressure, P H, where the tetragonal enthalpy drops below the orthorhombic. The OR state remains metastable up to a higher pressure, P M > P H. We find anomalies in magnetism and orthorhombicity as PP M and a trend towards elastic instability.


122-Pnictides Elastic instability Metastable OR Pressure 


  1. 1.
    Alireza, P., Ko, Y.T., Gillett, J., Petrone, C.M., Cole, J.M., Lonzarich, G.G., Sebastian, S.E.: J. Phys. Condens. Matter. 21, 012208 (2009)CrossRefADSGoogle Scholar
  2. 2.
    Torikachvili, M.S., Bud’ko, S.L., Ni, N., Canfield, P.C., Hannahs, S.T.: Phys. Rev. B 80, 014521 (2009)CrossRefADSGoogle Scholar
  3. 3.
    Mani, A., Ghost, S., Paulraj, S., Bharathi, A., Sundar, C.S.: Europhys. Lett. 87, 17004 (2009)CrossRefADSGoogle Scholar
  4. 4.
    Saha, S.R., Butch, N.P., Drye, T., Magill, J., Ziemak, S., Kirshenbaum, K., Zavalij, P.Y., Lynn, J.W., Paglione, J.: Phys. Rev. B 85, 024525 (2012)CrossRefADSGoogle Scholar
  5. 5.
    Torikachvili, M.S., Bud’ko, S.L., Ni, N., Canfield, P.C.: Phys. Rev. B 78, 104527 (2008)CrossRefADSGoogle Scholar
  6. 6.
    Krellner, C., Caroca-Canales, N., Jesche, A., Rosner, H., Ormeci, A., Geibel, C.: Phys. Rev. B 78, 100504 (2008)CrossRefADSGoogle Scholar
  7. 7.
    Huang, Q., Qiu, Y., Bao, W., Green, M.A., Lynn, J.W., Gasparovic, Y.C., Wu, T., Wu, G., Chen, X.H.: Phys. Rev. Lett. 101, 257003 (2008)CrossRefADSGoogle Scholar
  8. 8.
    Canfield, P., Budko, S., Ni, N., Kreyssig, A., Goldman, A., McQueeney, R., Torikachvili, M., Argyriou, D., Luke, G., Yu, W.: Physica C 469, 404 (2009)CrossRefADSGoogle Scholar
  9. 9.
    Ikeda, S., Yoshida, K., Kobayashi, H.: Hyperfine Interactions 208, 7 (2012)CrossRefADSGoogle Scholar
  10. 10.
    Kotegawa, H., Kawazoe, T., Sugawara, H., Murata, K., Tou, H., Phys, J.: Soc. Jpn. 78, 083702 (2009)CrossRefGoogle Scholar
  11. 11.
    Mittal, R., Mishra, S.K., Chaplot, S.L., Ovsyannikov, S.V., Greenberg, E., Trots, D.M., Dubrovinsky, L., Su, Y., Brueckel, T., Matsuishi, S., Hosono, H., Garbarino, G.: Phys. Rev. B 83, 054503 (2011)CrossRefADSGoogle Scholar
  12. 12.
    Uhoya, W., Stemshorn, A., Tsoi, G., Vohra, Y.K., Sefat, A.S., Sales, B.C., Hope, K.M., Weir, S.T.: Phys. Rev. B 82, 144118 (2010)CrossRefADSGoogle Scholar
  13. 13.
    Widom, M., Quader, K.: Phys. Rev. B 88, 045117 (2013)CrossRefADSGoogle Scholar
  14. 14.
    Quader, K., Widom, M.: Phys. Rev. B 90, 144512 (2014)CrossRefADSGoogle Scholar
  15. 15.
    Quader, K., Widom, M.: Contrib. Plasma Phys. 55, 128 (2015)CrossRefADSGoogle Scholar
  16. 16.
    Perdew, J.P., Burke, K., Ernzerhof, M.: Phys. Rev. Lett. 77, 3865 (1996)CrossRefADSGoogle Scholar
  17. 17.
    Kresse, G., Furthmuller, J.: Phys. Rev. B 54, 11169 (1996)CrossRefADSGoogle Scholar
  18. 18.
    Kittel, C.: Introduction to solid state physics, 8edn. Wiley (2005)Google Scholar
  19. 19.
    Mouhat, F., Couder, F.X.: Phys. Rev. B 90, 224104 (2014)CrossRefADSGoogle Scholar
  20. 20.
    Chu, M.T.: Acta Numer. 17, 1 (2008)CrossRefMathSciNetzbMATHGoogle Scholar
  21. 21.
    Guckenheimer, J., Holmes, P.: Nonlinear oscillations, dynamical systems and bifurcations of vector fields, Applied Mathematical Sciences, vol. 42. Springer (1983)Google Scholar
  22. 22.
    Innocenti, D., Poccia, N., Ricci, A., Valletta, A., Caprara, S., Perali, A., Bianconi, A.: Phys. Rev. B 82, 184528 (2010)CrossRefADSGoogle Scholar
  23. 23.
    Testardi, L.R.: Rev. Mod. Phys. 47, 637 (1975)CrossRefADSGoogle Scholar
  24. 24.
    Stewart, G.R.: Physica C 514, 28 (2015)Google Scholar
  25. 25.
    Zacharias, M., Paul, I., Garst, M.: Phys. Rev. Lett. 115, 025703 (2015)Google Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of PhysicsCarnegie-Mellon UniversityPittsburghUSA
  2. 2.Department of PhysicsKent State UniversityKentUSA

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