Specific Heat of the S=1/2 Two-Dimensional Shastry–Sutherland Antiferromagnet SrCu2(BO3)2in High Magnetic Fields
Abstract
We characterize the field-induced magnetic phases of SrCu 2 (BO 3 ) 2 , a frustrated spin-1/2 Heisenberg antiferromagnet in the two-dimensional Shastry–Sutherland lattice, using specific heat in magnetic fields up to 33 T. We find that the spin gap persists above the expected critical field H c = Δ/gµ B of 21 T despite the appearance of magnetic moment in the ground state. At the magnetization plateau at 1/8 of the saturation, the triplets that carry the magnetization of the ground state are observed to form a two-dimensional gas of large mass. A gas consisting of the same number of heavy particles continues to completely dominate the specific heat in the field region above the plateau, although the magnetization increases with increasing field. Ordering is observed immediately below the temperature region of the gas phase.
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Except for the high-temperature structure at 24.8 T, the C/T curves in zero and finite magnetic fields are in good agreement with reported data, both in absolute value and relative temperature dependence.
“Except for the high-temperature structure at 24.8 T, the C/T curves in zero and finite magnetic fields are in good agreement with the reported data, 36,42 both in absolute value and in the relative temperature dependence.”
From Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields (2023) · cites this paper as [42]
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Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields
Nomoto, T., Zhong, C., Kageyama, H., Suzuki, Y., Jaime, M., Hashimoto, Y., Katsumoto, S., Matsuyama, N., Dong, C., Matsuo, A., et al. (2023) · arXiv · doi:10.48550/arxiv.2302.01627 · Cited by 5 · see citing works
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- Authors
- Tsujii, H., R. Rotundu, C., Andraka, B., Takano, Y., Kageyama, H., & Ueda, Y.
- Affiliations
- University of Florida (US)
- Department of Physics, University of Florida, P. O. Box 118440, Gainesville, FL 32611-8440, U.S.A.
- The Institute for Solid State Physics, The University of Tokyo (JP)
- Venue
- Journal of the Physical Society of Japan
- Publisher
- Physical Society of Japan
- Published
- 2011-04-15
- Volume
- 80
- Issue
- 4
- Pages
- 043707
- ISSN
- 0031-9015 (ISSN-L)
- 1347-4073
- OpenAlex
- W2061135623
- Cited by
- 19
- References
- 0
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 9 · 2018: 2
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the Physical Society of Japan (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Theoretical and Computational Physics
- Keywords
- SrCu2(BO3)2, Shastry-Sutherland lattice, frustrated antiferromagnet, spin-1/2 Heisenberg antiferromagnet, specific heat, high magnetic fields, spin gap, magnetization plateau, magnetic ordering, two-dimensional spin systems
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Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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