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- Title
Low-Temperature Specific Heat Study of SrCu[sub 2](BO[sub 3])[sub 2] with an Exactly Solvable Ground State.
- Authors
Kageyama, H.; Onizuka, K.; Ueda, Y.; Nohara, M.; Suzuki, H.; Takagi, H.
- Abstract
The specific heat of a two-dimensional spin gap system SrCu[sub 2](BO[sub 3])[sub 2] realizing the Shastry-Sutherland model was measured between 1.3 and 25 K under various magnetic fields up to 12 T. The analysis based on an isolated dimer model in a low temperature region revealed that the value of the spin gap at zero field is Δ = 34.4 K. It turned out that A decreases in proportion to H due to the Zeeman splitting of the excited triplet levels. This simplest model, however, fails to reproduce the result in a high-temperature region, suggesting rather strong spin-spin correlation of the system.
- Subjects
STRONTIUM compounds; SPECIFIC heat
- Publication
Journal of Experimental & Theoretical Physics, 2000, Vol 90, Issue 1, p129
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/1.559083