Abstract
The recent neutron scattering data for spin-wave dispersion in HoMnO3 are well-described by an anisotropic Hubbard model on a triangular lattice with a planar (XY) spin anisotropy. Best fit indicates that magnetic excitations in HoMnO3 correspond to the strong-coupling limit U/t >∼ 15, with planar exchange energy J = 4t 2 /U ≃ 2.5 meV and planar anisotropy ΔU ≃ 0.35 meV.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K Kanoda, Physica C282–287, 299 (1997); Hyperfine Interact. 104, 235 (1997)
R H McKenzie, Science 278, 820 (1997)
K Takada et al, Nature (London) 422, 53 (2003)
H H Weitering, X Shi, P D Johnson, J Chen, N J Dinardo and S Kempa, Phys. Rev. Lett. 78, 1331 (1997)
T Inami, Y Ajiro and T Goto, J. Phys. Soc. Jpn. 65, 2374 (1996)
L E Svistov, A I Smirnov, L A Prozorova, O A Petrenko, L N Demianets and A Ya Shapiro, Phys. Rev. B67, 094434 (2003)
O P Vajk, M Kenzelmann, J W Lynn, S B Kim and S-W Cheong, Phys. Rev. Lett. 94, 087601 (2005)
T J Sato, S-H Lee, T Katsufuji, M Masaki, S Park, J R D Copley and H Takagi, Phys. Rev. B68, 014432 (2003)
A Singh, Phys. Rev. B71, 214406 (2005)
R Coldea, S M Hayden, G Aeppli, T G Perring, C D Frost, T E Mason, S-W Cheong and Z Fisk, Phys. Rev. Lett. 86, 5377 (2001)
A Singh and P Goswami, Phys. Rev. B66, 92402 (2002)
R C O’Handley, Modern magnetic materials: Principles and applications (Wiley, New York, 2000) p. 198
T Murao, in The structure and properties of matter edited by T Matsubara (Springer, Berlin, 1982) pp. 293–296
R Sachidanandam, T Yildirim, A B Harris, A Aharony and O E Wohlman, Phys. Rev. B56, 260 (1997)
I Dzyaloshinsky, J. Phys. Chem. Colloids 4, 241 (1958)
T Moriya, Phys. Rev. 120, 91 (1960)
E Hanamura, K Hagita and Y Tanabe, J. Phys.: Condens. Matter 15, L103 (2003)
A Singh and Z Tešanović, Phys. Rev. B43, 11445 (1990)
T A Kaplan, Z. Physik B49, 313 (1983)
B Binz, A Vishwanath and V Aji, Phys. Rev. Lett. 96, 207202 (2006)
B Binz and A Vishwanath, Phys. Rev. B74, 214408 (2006)
L M Roth, Phys. Rev. 149, 306 (1966)
K Held and D Vollhardt, Euro. Phys. J. B5, 473 (1998)
A Singh, Phys. Rev. B43, 3617 (1991)
A Singh and P Sen, Phys. Rev. B57, 10598 (1998)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ghosh, S., Singh, A. Anisotropic Hubbard model on a triangular lattice — spin dynamics in HoMnO3 . Pramana - J Phys 70, 163–171 (2008). https://doi.org/10.1007/s12043-008-0014-3
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12043-008-0014-3