ESR Study on the Excited State Energy Spectrum of SrCu2(B03)2--A Central Role of Multiple-Triplet Bound States

• Nojiri Hiroyuki

  Department of Physics, Okayama University

• Kageyama Hiroshi

  Institute for Solid State Physics, University of Tokyo

• Ueda Yutaka

  Institute for Solid State Physics, University of Tokyo

• Motokawa Mitsuhiro

  Institute for Materials Research, Tohoku University

書誌事項

タイトル別名

• ESR Study on the Excited State Energy Spectrum of SrCu2(BO3)2-A Central Role of Multiple-Triplet Bound States-
• ESR Study on the Excited State Energy Spectrum of SrCu₂(BO₃)₂–A Central Role of Multiple-Triplet Bound States–
• ESR study on the excited state energy spectrum of SrCu2(BO3)2

抄録

The excited state energy spectrum of a two-dimensional dimer system SrCu₂(BO₃)₂ has been investigated by high field ESR. Besides two non-degenerated one-triplet excitations, various types of multiple-triplet bound states are identified: singlet, triplet, and quintet. The intensity of these bound states is extremely strong because one-triplet process is strongly suppressed in the orthogonal dimer system. The bound singlet state is found slightly below the energy gap of the one-triplet state, indicating the proximity to a quantum critical point. A band of the two-triplet bound state splits due to distant neighbor interactions. The bound quintet state is the direct evidence of two-triplet object made up of four S=1⁄2 spins. The energy of the lowest quintet becomes lower than that of the one-triplet excitation before the closing of the lowest spin gap, namely, the quintet touches first to the ground singlet state. The present investigation exhibits an essential role of multiple-triplet bound states in the magnetic excitation spectrum.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 72 (12), 3243-3253, 2003

  一般社団法人 日本物理学会

キーワード

• SrCu<SUB>2</SUB>(BO<SUB>3</SUB>)<SUB>2</SUB>
• spin gap
• ESR
• magnetic excitation
• high magnetic field

詳細情報

• CRID: 1390282679164218240
• NII論文ID: 210000104611
• NII論文ID: 110001954373
• NII論文ID: 130004538334
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.72.3243
• BIBCODE: 2003JPSJ...72.3243N
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 6789586
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6789586
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.72.3243
• 本文言語コード: en
• データソース種別:
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