Journal of Low Temperature Physics

, Volume 95, Issue 1–2, pp 335–341 | Cite as

Charge dynamics and spin order in doped Hubbard models

  • Arno P. Kampf
  • Wolfram Brenig
Microscopic Concepts/Aspects of Dimensionality

Abstract

Hole motion in an antiferromagnetic (AF) environment is accompanied by the emission of spin wave excitations. Spin-wave shakeoffs are responsible for incoherent contributions to the dynamics of propagating holes. Using a spin-density-wave polaron scheme we calculate the optical conductivity σ(ω) and show that the incoherent part of the hole spectrum contributes to the low-frequency part of σ(ω).

Separately, we discuss the possible formation of spiral spin patterns upon doping of the half-filled one-band Hubbard model. In particular, we consider the influence of band structure effects arising from nearest- and next-nearest-neighbor hopping processes on a square lattice. Differences in the ground state spin patterns for hole and electron doping are obtained offering a possible explanation for the persistence of AF order in low electron-doped cuprate superconductors.

PACS numbers

75.10L 75.30F 75.30D 

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References

  1. 1.
    W. Brenig and A. P. Kampf, previous article in this volume andEurophys. Lett. 24, 679 (1993)Google Scholar
  2. 2.
    B.I. Shraiman and E.D. Siggia,Phys. Rev. Lett. 62, 1564 (1989);Phys. Rev. B 40, 9162 (1989)Google Scholar
  3. 3.
    C. Jayaprakash, H.R. Krishnamurty, and S. Sarker,Phys. Rev. B 40, 2610 (1989)Google Scholar
  4. 4.
    C.L. Kane, P.A. Lee, T.K. Ng, B. Chakraborty, and N. Read,Phys. Rev. B 41, 2653 (1990)Google Scholar
  5. 5.
    E. Arrigoni and G.C. Strinati,Phys. Rev. B 44, 7455 (1991)Google Scholar
  6. 6.
    R. Frésard and P. Wölfle,J. Phys. Condensed Matt. 4, 3625 (1992); M. Dzierzawa,Zeitschrift für Physik B 86, 49 (1992); R. Frésard, M. Dzierzawa, and P. Wölfle,Europhys. Lett. 15, 325 (1991)Google Scholar
  7. 7.
    F.F. Assaad,Phys. Rev. B 47, 7910 (1993)Google Scholar
  8. 8.
    T.R. Thurston, M. Matsuda, K. Kakurai, K. Yamada, Y. Endoh, R.J. Birgeneau, P.M. Gehring, Y. Hidaka, M.A. Kastner, T. Murakami, and G. Shirane,Phys. Rev. Lett. 65, 263 (1990)Google Scholar
  9. 9.
    S. Uchida, T. Ido, H. Takagi, T. Arima, Y. Tokura, S. Tajima,Phys. Rev. B 43, 7942 (1991)Google Scholar
  10. 10.
    H.Q. Lin and J.E. Hirsch,Phys. Rev. B 35, 3359 (1987)Google Scholar
  11. 11.
    Z.Y. Weng and C.S. Ting,Phys. Rev. B 42, 803 (1990)Google Scholar
  12. 12.
    B. Keimer, A. Aharony, A. Auerbach, R.J. Birgeneau, A. Cassanho, Y. Endoh, R.W. Erwin, M.A. Kastner, and G. Shirane,Phys. Rev. B 45, 7430 (1992)Google Scholar

Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • Arno P. Kampf
    • 1
  • Wolfram Brenig
    • 1
  1. 1.Institut für Theoretische PhysikUniversität zu KölnKölnGermany

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