Abstract
In this paper, we review some recent results, obtained by means of exact diagonalization technique, about the competition between the octahedral distortions and the Coulomb interactions for the t 2g electrons in layered Ca-based ruthenates. We provide a scenario where the flattening of the octahedra is the driving mechanism for yielding an antiferromagnetic state with C- or G-type structure and different orbital configurations. On the other hand, we show that the elongation of the octahedra gives rise to a ground state with incomplete ferromagnetism. To further account for unconventional spin-orbital configurations in the Ca2RuO4system, where all the t 2gdegrees of freedom contribute, the role of the spin-orbit coupling and its competition with compressed octahedral deformations are investigated. One of the main findings is the occurrence of anisotropic spin patterns with partially filled orbital occupation and coexisting ferro- and antiferro-type correlations in the spin/orbital channel.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
M. Imada, A. Fujimori, Y. Tokura, Rev. Mod. Phys. 70, 1039 (1998).
S. Nakatsuji, Y. Maeno, Phys. Rev. Lett. 84, 2666 (2000).
3. Y. Maeno, H. Hashimoto, K. Yoshida, S. Nishizaki, T. Fujita, J.G. Bednorz, F. Lichtenberg, Nature (London) 372, 532 (1994); Y. Maeno, T.M. Rice, M. Sigrist, Phys. Today 54, 42 (2001).
S. Nakatsuji, S. Ikeda, Y. Maeno, J. Phys. Soc. Jpn. 66, 1868 (1997).
5. S. Nakatsuji, Y. Maeno, Phys. Rev. B 62, 6458 (2000); S. Nakatsuji, Y. Maeno, Phys. Rev. Lett. 84,2666(2000).
M. Braden, G. Andr é , S. Nakatsuji, Y. Maeno, Phys. Rev. B 58, 847 (1998).
O. Friedt, M. Braden, G. Andr é, P. Adelmann, S. Nakatsuji, Y. Maeno, Phys. Rev. B 63,174432 (2001).
C.S. Alexander, G. Cao, V. Dobrosavljevic, S. McCall, J.E. Crow, E. Lochner, R.P. Guertin, Phys. Rev. B R8422R8425 (1999).
T. Mizokawa, L.H. Tjeng, G.A. Sawatzky, G. Ghiringhelli, O. Tjernberg, N.B. Brookes, H. Fukazawa, S. Nakatsuji, Y. Maeno, Phys. Rev. Lett. 87, 077202 (2001).
M. Cuoco, F. Forte, C. Noce, Phys. Rev. B 73, 094428 (2006).
I. Zegkinoglou, J. Strempfer, C.S. Nelson, J.P. Hill, J. Chakhalian, C. Bernhard, J.C. Lang, G. Srajer, H. Fukazawa, S. Nakatsuji, Y. Maeno, B. Keimer, Phys. Rev. Lett. 95, 136401 (2005).
T. Nomura, K. Yamada, J. Phys. Soc. Jpn. 69, 1856 (2000).
S. Okamoto, A.J. Millis, Phys. Rev. B 70, 195120 (2004).
Z. Fang, K. Terakura, Phys. Rev. B 64, 020509(R) (2001).
Z. Fang, N. Nagaosa, K. Terakura, Phys. Rev. B 69, 045116 (2004).
J.H. Jung, Z. Fang, J.P. He, Y. Kaneko, Y. Okimoto, Y. Tokura, Phys. Rev. Lett. 91, 056403 (2002).
J.S. Lee, Y.S. Lee, T.W. Noh, S.-J. Oh, Jaejun Yu, S. Nakatsuji, H. Fukazawa, Y. Maeno, Phys. Rev. Lett. 89, 257402 (2002).
A. Koga, N. Kawakami, T.M. Rice, M. Sigrist, Phys. Rev. Lett. 92, 216402 (2004).
A. Liebsch, Phys. Rev. B 70, 165103 (2004).
S. Biermann, L. de Medici, A. Georges, Phys. Rev. Lett. 95, 206401 (2005).
T. Hotta, Dagotto, Phys. Rev. Lett. 88, 017201 (2002).
M. Cuoco, F. Forte, C. Noce, Phys. Rev. B 74, 195124 (2006).
M. Kriener, P. Steffens, J. Baier, O. Schumann, T. Zabel, T. Lorenz, O. Friedt, R. M üller, A. Gukasov, P.G. Radaelli, P. Reutler, A. Revcolevschi, S. Nakatsuji, Y. Maeno, M. Braden, Phys. Rev. Lett. 95, 267403 (2005).
J.F. Karpus, R. Gupta, H. Barath, S.L. Cooper, Phys. Rev. Lett. 93, 167205 (2004).
V.I. Anisimov, I.A. Nekrasov, D.E. Kondakov, T.M. Rice, M. Sigrist, Eur. Phys. J. B 25, 191 (2002).
26. J. Jakli č , P. Prelovšek, Phys. Rev. B 49, 5065(R) (1994); J. Jakli č , P. Prelovšek, Adv. Phys. 49, 1(2000).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer Science + Business Media B.V.
About this paper
Cite this paper
Cuoco, M., Forte, F., Noce, C. (2008). Spin-Orbital-Lattice Physics in Ca-Based Ruthenates. In: Barbara, B., Imry, Y., Sawatzky, G., Stamp, P.C.E. (eds) Quantum Magnetism. NATO Science for Peace and Security Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8512-3_6
Download citation
DOI: https://doi.org/10.1007/978-1-4020-8512-3_6
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-8511-6
Online ISBN: 978-1-4020-8512-3
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)