TY - JOUR
T1 - Spin gap in the hole-doped spin ladder system (Sr2.5Ca11.5)Cu24O41
T2 - Neutron inelastic scattering study
AU - Katano, S.
AU - Nagata, T.
AU - Akimitsu, J.
AU - Nishi, M.
AU - Kakurai, K.
PY - 1999
Y1 - 1999
N2 - The spin liquid state in the hole-doped two-leg ladder system (Sr2.5Ca11.5)Cu24O41which exhibits unique superconductivity under high pressure, has been studied by neutron inelastic scattering at ambient pressure. The spin gap energy for the ladder is found to be 32.1±0.3meV, which is still almost the same as that of the parent material Sr14Cu24O41. From the observed dispersion relation, the exchange coupling is roughly estimated at J∥∼90±15meV (along the ladders) and J⊥∼65±10meV(along the rungs). The coupling constant J? is slightly decreased from that obtained for the parent compound.
AB - The spin liquid state in the hole-doped two-leg ladder system (Sr2.5Ca11.5)Cu24O41which exhibits unique superconductivity under high pressure, has been studied by neutron inelastic scattering at ambient pressure. The spin gap energy for the ladder is found to be 32.1±0.3meV, which is still almost the same as that of the parent material Sr14Cu24O41. From the observed dispersion relation, the exchange coupling is roughly estimated at J∥∼90±15meV (along the ladders) and J⊥∼65±10meV(along the rungs). The coupling constant J? is slightly decreased from that obtained for the parent compound.
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U2 - 10.1103/PhysRevLett.82.636
DO - 10.1103/PhysRevLett.82.636
M3 - Article
AN - SCOPUS:0000120792
SN - 0031-9007
VL - 82
SP - 636
EP - 639
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
ER -