Structure and dynamics of spin polarons induced by doping a Haldane spin-1 chain Collin Broholm * Hopkins University and NIST Center for Neutron Rese * Supported by the National Science Foundation ing Chen LANL uangyong Xu BNL . Aeppli UCL . F. DiTusa LSU . A. Zaliznyak BNL . D. Frost ISIS . Ito Tsukuba M. Kenzelmann JHU K. Oka Tsukuba T. G. Perring ISIS H. Takagi ISSP M. E. Bisher NEC M. M. J. Treacy NEC R. Paul NIST Xu et al., Science 289, 419 (2000) Kenzelmann et al., PRL 90, 087202 (2003)
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Structure and dynamics of spin polarons induced by doping a Haldane spin-1 chain
Structure and dynamics of spin polarons induced by doping a Haldane spin-1 chain. Collin Broholm * Johns Hopkins University and NIST Center for Neutron Research. M. KenzelmannJHU K. Oka Tsukuba T. G. PerringISIS H. TakagiISSP M. E. Bisher NEC M. M. J. TreacyNEC - PowerPoint PPT Presentation
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Transcript
Structure and dynamics of spin polarons induced by doping a Haldane
spin-1 chain
Collin Broholm*
Johns Hopkins University and NIST Center for Neutron Research
* Supported by the National Science Foundation
Ying Chen LANLGuangyong Xu BNLG. Aeppli UCLJ. F. DiTusa LSU I. A. Zaliznyak BNLC. D. Frost ISIST. Ito Tsukuba
M. Kenzelmann JHUK. Oka TsukubaT. G. Perring ISISH. Takagi ISSP M. E. Bisher NECM. M. J. Treacy NECR. Paul NIST
Xu et al., Science 289, 419 (2000)Kenzelmann et al., PRL 90, 087202 (2003)
Outline
1. Introduction to pure Y2BaNiO5
2. Site impurities (Mg2+↔ Ni2+)
3. Bond impurities (Ca2+↔ Y3+)
4. Conclusions and outlook
Sendai 11/8/03SPINS cold neutron spectrometer at NCNR