Spin-Singlet Ground State in the Two-Dimensional Frustrated Triangular Lattice: YbAl<SUB>3</SUB>C<SUB>3</SUB>
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- Kato Yoshiaki
- Graduate School of Science and Engineering, Saitama University
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- Kosaka Masashi
- Graduate School of Science and Engineering, Saitama University
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- Nowatari Hiromi
- Graduate School of Science and Engineering, Saitama University
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- Saiga Yuta
- Graduate School of Science and Engineering, Saitama University
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- Yamada Atsushi
- Graduate School of Science and Engineering, Saitama University
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- Kobiyama Takuya
- Graduate School of Science and Engineering, Saitama University
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- Katano Susumu
- Graduate School of Science and Engineering, Saitama University
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- Ohoyama Kenji
- Institute for Materials Research, Tohoku University
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- Suzuki Hiroyuki S.
- National Institute for Materials Science
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- Aso Naofumi
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo
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- Iwasa Kazuaki
- Department of Physics, Tohoku University
Bibliographic Information
- Other Title
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- Spin-singlet ground state in the two-dimensional frustrated triangular lattice: YbAl3C3
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Description
We present the highly frustrated phenomena observed in YbAl3C3 with a spin gap. The inelastic neutron spectra of low-lying magnetic excitations at low temperatures are quite similar to those of SrCu2(BO3)2 and (CuCl)LaNb2O7 that exhibit a dimer ground state in a two-dimensional quantum spin system. The structure of the first excited triplet state is directly clarified by inelastic neutron scattering experiments with a higher energy resolution. Furthermore, it becomes clear that the characteristic magnetic excitations remain within a high-temperature region. The result of the specific heat measurement also shows an anomaly associated with the formation of dimerized Yb ions. We conclude that a long-range magnetic order is suppressed by a large geometrical spin frustration, resulting in the stabilization of the dimer ground state.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 77 (5), 053701-053701, 2008
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204197522816
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- NII Article ID
- 130005436459
- 110006665978
- 210000107212
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 9488961
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL Search
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed