TY - JOUR
T1 - Low-temperature specific heat study of SrCu2(BO3)2 with an exactly solvable ground state
AU - Kageyama, H.
AU - Onizuka, K.
AU - Ueda, Y.
AU - Nohara, M.
AU - Suzuki, H.
AU - Takagi, H.
N1 - Copyright:
Copyright 2005 Elsevier B.V., All rights reserved.
PY - 2000
Y1 - 2000
N2 - The specific heat of a two-dimensional spin gap system SrCu2(BO3)2 realizing the Shastry-Sutherland model was measured between 1.3 K 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 Δ decreases in proportion with 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.
AB - The specific heat of a two-dimensional spin gap system SrCu2(BO3)2 realizing the Shastry-Sutherland model was measured between 1.3 K 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 Δ decreases in proportion with 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.
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M3 - Article
AN - SCOPUS:0039194083
SN - 0044-4510
VL - 117
SP - 145
EP - 148
JO - Zhurnal Eksperimental'noj i Teoreticheskoj Fiziki
JF - Zhurnal Eksperimental'noj i Teoreticheskoj Fiziki
IS - 1
ER -