Spin-singlet ground state in the two-dimensional frustrated triangular lattice: YbAl3C3

• Kato Yoshiaki

  Graduate School of Science and Engineering, Saitama University

• Kosaka Masashi

  Graduate School of Science and Engineering, Saitama University

• Nowatari Hiromi

  Graduate School of Science and Engineering, Saitama University

• Saiga Yuta

  Graduate School of Science and Engineering, Saitama University

• Yamada Atsushi

  Graduate School of Science and Engineering, Saitama University

• Kobiyama Takuya

  Graduate School of Science and Engineering, Saitama University

• Katano Susumu

  Graduate School of Science and Engineering, Saitama University

• Ohoyama Kenji

  Institute for Materials Research, Tohoku University

• Suzuki Hiroyuki S.

  National Institute for Materials Science

• Aso Naofumi

  Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo

• Iwasa Kazuaki

  Department of Physics, Tohoku University

書誌事項

タイトル別名

• Spin-Singlet Ground State in the Two-Dimensional Frustrated Triangular Lattice: YbAl<SUB>3</SUB>C<SUB>3</SUB>

抄録

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.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (5), 053701-053701, 2008

  一般社団法人 日本物理学会

キーワード

• frustrated triangular lattice
• spin-singlet ground state
• inelastic neutron scattering

詳細情報

• CRID: 1390001204197522816
• NII論文ID: 130005436459
• NII論文ID: 110006665978
• NII論文ID: 210000107212
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.053701
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9488961
• Web Site: http://id.nii.ac.jp/1586/00013280/
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9488961
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.053701
• 本文言語コード: en
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