Advertisement

Heavy-Fermion Systems

  • Peter Fulde
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 100)

Abstract

Investigations of heavy-fermion systems or metals with heavy electrons have developed into a new branch of metal physics. For recent theoretical and experimental reviews see, e.g., [13.1–5] and [13.6–8], respectively. In all cases those systems contain either Ce, Yb, U, or Np as one of their constituents, i.e., there are always 4for 5felectrons involved. Characteristic examples are: CeAl3, CeCu2Si2, CeRu2Si2, CeCu6, CeB6, YbAl3, YbCu2Si2, UBe1 3, UPt3, UCd11 U2Zn17, and NpBe1 3. Below a characteristic temperature T*, heavy-fermion systems show Fermi-liquid behavior with huge effective masses m* of the quasiparticles. In fact, m* may be several hundred times the free electron mass. Consequently, the low-temperature specific heat C = γT has an enormously large γ coefficient:γ is of order of 1 J mol−1 K−2, rather than 1 mJ mol−1 K2 as in sodium metal. The Pauli paramagnetic susceptibility is similarly enhanced in this temperature range. As the temperature increases to values above T*, the quasiparticles lose their heavy masses. The specific heat levels off as indicated in Fig. 13.1, and the susceptibility changes from a Pauli to a Curie-like behavior. With increasing temperature the Ce and U ions behave more and more like ions with well-localized f electrons.

Keywords

Fermi Surface Fermi Energy Orbital Degeneracy Crystalline Electric Field Quasiparticle Band 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Chapter 13

  1. 13.1
    G. Czycholl: Phys. Rep. 143, 277 (1986)ADSCrossRefGoogle Scholar
  2. 13.2
    P.A. Lee, T.M. Rice, J.M. Serene, LJ. Sham, J.W. Wilkins: Comments Condensed Matter Phys. 12, 99 (1986)Google Scholar
  3. 13.3
    P. Fulde, J. Keller, G. Zwicknagl: In Solid State Physics, Vol. 41, ed. by H. Ehrenreich, D. Turnbull (Academic, San Diego 1988) p. 1Google Scholar
  4. 13.4
    P. Schlottmann: Phys. Rep. 181, 1 (1989)ADSCrossRefGoogle Scholar
  5. 13.5
    G. Zwicknagl: Adv. Phys. 41, 203 (1992)ADSCrossRefGoogle Scholar
  6. 13.6
    G.R. Stewart: Rev. Mod. Phys. 56, 755 (1984)ADSCrossRefGoogle Scholar
  7. 13.7
    H.R. Ott: Prog. Low Temp. Phys. 11, 215 (1987)CrossRefGoogle Scholar
  8. 13.8
    N. Grewe, F. Steglich: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 14, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1991)Google Scholar
  9. 13.9
    P.H.P. Reinders, M. Springford, P.T. Coleridge, R. Boulet, D. Ravot: Phys. Rev. Lett. 57,1631 (1986)ADSCrossRefGoogle Scholar
  10. 13.10
    L. Taillefer, G.G. Lonzarich: Phys. Rev. Lett. 60, 1570 (1988)ADSCrossRefGoogle Scholar
  11. 13.11
    G. Zwicknagl: J. Magn. Magn. Mater. 76&77, 16 (1988)ADSCrossRefGoogle Scholar
  12. 13.12
    F. Steglich, J. Aarts, CD. Bredl, W. Lieke, D. Meschede, W. Franz, H. Schäfer: Phys. Rev. Lett. 43, 1892 (1979)ADSCrossRefGoogle Scholar
  13. 13.13
    G Kittel: Quantum Theory of Solids (Wiley, New York 1963)Google Scholar
  14. 13.14
    E. Runge: Ph.D. Thesis, Technische Hochschule Darmstadt (1989)Google Scholar
  15. 13.15
    G. Zwicknagl, E. Runge, N.E. Christensen: Physica B 163, 97 (1990)ADSCrossRefGoogle Scholar
  16. 13.16
    G.G. Lonzarich: J. Magn. Magn. Mater. 76&77, 1 (1988)ADSCrossRefGoogle Scholar
  17. 13.17
    N. Grewe, H. Keiter: Phys. Rev. B 24, 4420 (1981)ADSGoogle Scholar
  18. 13.18
    C. Lacroix, M. Cyrot: Phys. Rev. B 20, 1969 (1979)ADSGoogle Scholar
  19. 13.19
    N.E. Bickers: Rev Mod. Phys. 59, 845 (1987)ADSCrossRefGoogle Scholar
  20. 13.20
    N. Read, D.N. Newns: J. Phys. C 16, 3273 (1983)ADSGoogle Scholar
  21. 13.21
    P. Coleman: Phys. Rev. B 29, 3035 (1984)ADSGoogle Scholar
  22. 13.22
    N.E. Bickers, D.L. Cox, J.W. Wilkins: Phys. Rev. B 36, 2036 (1987)ADSGoogle Scholar
  23. 13.23
    F.C. Zhang, T.K. Lee: Phys. Rev. B 28, 33 (1983)ADSGoogle Scholar
  24. 13.24
    G. Zwicknagl, V. Zevin, P. Fulde: Z. Phys. B 79, 365 (1990)ADSCrossRefGoogle Scholar
  25. 13.25
    E. Müller-Hartmann: Z. Phys. B 57, 281 (1984)ADSCrossRefGoogle Scholar
  26. 13.26
    T.M. Rice, K. Ueda: Phys. Rev. Lett. 55, 995, 2093 (E) (1985)ADSCrossRefGoogle Scholar
  27. 13.27
    P. Fazekas: J. Magn. Magn. Mater. 63&64, 545 (1987)ADSCrossRefGoogle Scholar
  28. 13.28
    D. Rainer: Winter Meet. Low Temp. Phys. 3rd. Hacienda Cocyoc (1982)Google Scholar
  29. 13.29
    P. Thalmeier, B. Lüthi: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 14, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1991)Google Scholar
  30. 13.30
    P. Fulde: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 2, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1978) p. 295Google Scholar
  31. 13.31
    J. Keller, R. Bulla, T. Höhn, K.W. Becker: Phys. Rev. B 41, 1878 (1990)ADSGoogle Scholar
  32. 13.32
    A.K. Albessard, T. Ebihara, I. Umehara, K. Satoh, Y. Onuki, H. Aoki, S. Uji, T. Shimizu: Physica B (to appear)Google Scholar

Copyright information

© Springer -Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Peter Fulde
    • 1
  1. 1.MPI für FestkörperforschungStuttgart 80Deutschland

Personalised recommendations