Publication: Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb 2 Cu 3 SnF 12
Issued Date
2014-01-21
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ISSN
1550235X
10980121
10980121
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2-s2.0-84892906285
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Mahidol University
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SCOPUS
Bibliographic Citation
Physical Review B - Condensed Matter and Materials Physics. Vol.89, No.2 (2014)
Suggested Citation
K. Matan, Y. Nambu, Y. Zhao, T. J. Sato, Y. Fukumoto, T. Ono, H. Tanaka, C. Broholm, A. Podlesnyak, G. Ehlers Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb 2 Cu 3 SnF 12. Physical Review B - Condensed Matter and Materials Physics. Vol.89, No.2 (2014). doi:10.1103/PhysRevB.89.024414 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/34116
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Title
Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb 2 Cu 3 SnF 12
Abstract
High-intensity pulsed neutron scattering reveals a new set of magnetic excitations in the pinwheel valence-bond solid state of the distorted kagome lattice antiferromagnet Rb2Cu3SnF12. The polarization of the dominant dispersive modes (2meV<â ω<7meV) is determined and found consistent with a dimer series expansion with strong Dzyaloshinskii-Moriya interactions (D/J=0.18). A weakly dispersive mode near 5 meV and shifted "ghosts" of the main modes are attributed to the enlarged unit cell below a T=215 K structural transition. Continuum scattering between 8 and 10 meV might be interpreted as a remnant of the kagome spinon continuum [Nature (London) 492, 406 (2012).NATUAS0028-083610.1038/nature11659]. © 2014 American Physical Society.