Observation of Elementary Excitations of Quantum Sine-Gordon Spin System KCuGaF6 Under High Magnetic Field |
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| Authors: | I. Umegaki H. Tanaka T. Ono H. Nojiri |
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| Affiliation: | 1. Department of Physics, Tokyo Institute of Technology, Tokyo, 152-8551, Japan
2. Institute for Material Research, Tohoku University, Sendai, Japan
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| Abstract: | In magnetic field, KCuGaF6 can be mapped onto the quantum sine-Gordon model, for which low-energy elementary excitations are solitons, antisolitons and their bound states breathers. Using high-frequency, high-field ESR measurements, we observed these unusual magnetic excitations. |
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