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research
Spin and mass excitations in the doped multiple spin exchange model on a triangular lattice: 3He on graphite
Authors
Y. Ohta
K. Seki
T. Shirakawa
Publication date
1 January 2009
Publisher
Bristol : IOP Publishing Ltd.
Doi
Cite
Abstract
Using an exact-diagonalization technique on small clusters, we calculate the spin and density excitation spectra as well as the temperature dependence of the specific heat for the triangular-lattice t-J model with the multiple-spin exchange interactions, whereby we consider the low-energy excitations of the two-dimensional liquid 3He adsorbed on graphite. We find that, for a relevant set of the parameter values, the spectral weight for the spin excitations is concentrated on a very low-energy region, while that of the density excitations extends over a wide energy range, indicating the clear separation of their energy scales. The double-peak structure in the temperature dependence of the specific heat is also obtained. © 2009 IOP Publishing Ltd.Ministry of Education, Culture, Sports, Science and Technology of Japan/18028008Ministry of Education, Culture, Sports, Science and Technology of Japan/18043006Ministry of Education, Culture, Sports, Science and Technology of Japan/18540338Ministry of Education, Culture, Sports, Science and Technology of Japan/19014004JSPS Research Fellowship for Young Scientist
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 05/08/2017