TY - JOUR
T1 - Spin dynamics of the spin-ladder dimer-chain material Sr14Cu24O41
AU - Eccleston, Roger S.
AU - Uehara, Masatomo
AU - Akimitsu, Jun
AU - Eisaki, Hiroshi
AU - Motoyama, Naoki
AU - Uchida, Shin Ichi
PY - 1998
Y1 - 1998
N2 - We have performed inelastic neutron scattering on a single crystal sample of Sr14Cu24O41 to study the spin dynamics of the Cu2O3 spin ladder layers and CuO2 chains. Our data are best fitted with a dispersion which has a spin gap of 32.5±0.1meV and a maximum of 193.5±2.4meV, consistent with a coupling along the ladders, J∥=130 meV and a rung coupling J⊥ = 72 meV. Excitations with an energy transfer of approximately 11.5 meV arise from a dimer chain with an antiferromagnetic intradimer coupling J1=11.2meV between next-nearest-neighbor Cu ions, and a ferromagnetic interdimer coupling J2=−1.1meV. The dimer chains have a periodicity of five units.
AB - We have performed inelastic neutron scattering on a single crystal sample of Sr14Cu24O41 to study the spin dynamics of the Cu2O3 spin ladder layers and CuO2 chains. Our data are best fitted with a dispersion which has a spin gap of 32.5±0.1meV and a maximum of 193.5±2.4meV, consistent with a coupling along the ladders, J∥=130 meV and a rung coupling J⊥ = 72 meV. Excitations with an energy transfer of approximately 11.5 meV arise from a dimer chain with an antiferromagnetic intradimer coupling J1=11.2meV between next-nearest-neighbor Cu ions, and a ferromagnetic interdimer coupling J2=−1.1meV. The dimer chains have a periodicity of five units.
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U2 - 10.1103/PhysRevLett.81.1702
DO - 10.1103/PhysRevLett.81.1702
M3 - Article
AN - SCOPUS:0000591361
SN - 0031-9007
VL - 81
SP - 1702
EP - 1705
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
ER -