Abstract
Recently it has become clear that the orbital momentum is not completely quenched in the High Tc superconductors. In this paper we focus on the role of orbital degrees of freedom in Mott-Hubbard insulators. We first rederive the molecular field (Kugel- Khomskii) picture for d 9 systems and we present new results on the excitation spectra. We show that this classical picture is incomplete: low lying orbital excitations give rise to a strong enhancement of the quantum spin fluctuations. Further, we comment on Weber’s suggestion that observed phonon-anomalies might be due to Jahn-Teller physics.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
F. C. Zhang and T. M. Rice, Phys. Rev. B 37, 3759 (1988).
H. Eskes and G. A. Sawatzky, Phys. Rev. Lett. 61, 1415 (1989).
A. Bianconi, Physica C, in press.
N. Nücker et al, Phys. Rev. B 39, 6619 (1989).
G. A. Gehring and K. A. Gehring, Rep. Prog. Phys. 38, 1 (1975).
K. I. Kugel and D. I. Khomskii, Sov. Phys. Usp. 25, 231 (1982).
K. I. Kugel and D. I. Khomskii, Sov. Phys.-JETP 37, 725 (1973).
W. Weber, Physica C, in press.
D. L. Cox et al, Phys. Rev. Lett. 62, 2188 (1989).
H. Rietschel, L. Pintschovius and W. Reichardt, Physica C, in press; W. Reichardt, ibid; L. Pintschovius, Europhys. Lett. 5, 247 (1988).
K. A. Chao, J. Spalek and A. M. Oles, Phys. Stat. Sol. B 84, 747 (1977).
D. I. Khomskii and K. I. Kugel, Solid State Commun. 13, 763 (1973).
Y. Ito and J. Akimutsu, J. Phys. Soc. Jpn. 33, 1333 (1976);
L. D. Khoi and P. Veillet, Phys. Rev. B 11, 4128 (1975);
W. Kleemann and Y. Farge, J. Phys. (Paris) 36, 1293 (1975).
J. Zaanen, Proc. Int. Symp. High Temperature Superconductivity, Jaipur, India, ed. K. B. Garg, pp. 31 (1989).
O. K. Andersen, unpublished.
P. Horsch and W. von der Linden, Z. Phys. B 72, 181 (1988).
D. P. Arovas and A. Auerbach, Phys. Rev. B 38, 316 (1988);
D. P. Arovas and A. Auerbach, ibid., Phys. Rev. Lett. 61, 617 (1988).
D. Yoshioka, J. Phys. Soc. Jpn. 58, 5978 (1988).
S. Chakravarty, D. R. Nelson and B. I. Halperin, Phys. Rev. Lett. 60, 1057 (1988).
G. Shirane et al, Phys. Rev. Lett. 59, 1613 (1987).
J. Zaanen, L. F. Feiner and A. M. Oles, unpublished.
I. Affleck and J. B. Marston, Phys. Rev. B 37, 3774 (1988).
H. Eskes, G. A. Sawatzky and L. F. Feiner, Physica C 160, 424 (1989).
K. I. Kugel and D. I. Khomskii, Sov. Phys.-JETP 52, 501 (1980).
W. Reichardt, unpublished.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Plenum Press, New York
About this chapter
Cite this chapter
Zaanen, J., Oleś, A.M., Feiner, L.F. (1991). Orbital Dynamics and Spin Fluctuations in Cuprates. In: Reiter, G., Horsch, P., Psaltakis, G.C. (eds) Dynamics of Magnetic Fluctuations in High-Temperature Superconductors. NATO ASI Series, vol 246. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7490-9_23
Download citation
DOI: https://doi.org/10.1007/978-1-4684-7490-9_23
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-7492-3
Online ISBN: 978-1-4684-7490-9
eBook Packages: Springer Book Archive