Thermodynamic properties and elementary excitations in quantum sine-Gordon spin system KCuGaF6

• Morisaki Rieko

  Department of Physics, Tokyo Institute of Technology

• Ono Toshio

  Department of Physics, Tokyo Institute of Technology

• Tanaka Hidekazu

  Department of Physics, Tokyo Institute of Technology

• Nojiri Hiroyuki

  Institute for Material Research, Tohoku University

書誌事項

タイトル別名

• Thermodynamic Properties and Elementary Excitations in Quantum Sine-Gordon Spin System KCuGaF<SUB>6</SUB>

抄録

Thermodynamic properties and elementary excitations in S=1⁄2 one-dimensional Heisenberg antiferromagnet KCuGaF₆ were investigated by magnetic susceptibility, specific heat and ESR measurements. Due to the Dzyaloshinsky–Moriya interaction with alternating D-vectors and/or the staggered g-tensor, the staggered magnetic field is induced when subjected to external magnetic field. Specific heat in magnetic field clearly shows the formation of excitation gap, which is attributed to the staggered magnetic field. The specific heat data was analyzed on the basis of the quantum sine-Gordon (SG) model. We observed many ESR modes including one soliton and three breather excitations characteristic of the quantum SG model.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 76 (6), 063706-063706, 2007

  一般社団法人 日本物理学会

キーワード

• KCuGaF<SUB>6</SUB>
• one-dimensional antiferromagnet
• staggered field
• Dzyaloshinsky–Moriya interaction
• magnetic-field induced gap
• sine-Gordon model
• solitons
• breathers

詳細情報

• CRID: 1390282679171028992
• NII論文ID: 130005296854
• NII論文ID: 110006342580
• NII論文ID: 210000106716
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.76.063706
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 8769382
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8769382
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.063706
• 本文言語コード: en
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