He H, Sidis Y, Bourges P, Gu G D, Ivanov A, Koshizuka N, Liang B, Lin C T, Regnault L P, Schoenherr E, Keimer B
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
Phys Rev Lett. 2001 Feb 19;86(8):1610-3. doi: 10.1103/PhysRevLett.86.1610.
An inelastic neutron scattering study of overdoped Bi(2)Sr(2)CaCu(2)O(8+delta) ( T(c) = 83 K) has revealed a resonant spin excitation in the superconducting state. The mode energy is E(res) = 38.0 meV, significantly lower than in optimally doped Bi(2)Sr(2)CaCu(2)O(8+delta) ( T(c) = 91 K, E(res) = 42.4 meV). This observation, which indicates a constant ratio E(res)/k(B)T(c) approximately 5.4, helps resolve a long-standing controversy about the origin of the resonant spin excitation in high temperature superconductors.
对过掺杂的Bi(2)Sr(2)CaCu(2)O(8+δ)（Tc = 83 K）进行的非弹性中子散射研究揭示了超导态下的共振自旋激发。该模式能量为E(res)= 38.0毫电子伏，明显低于最佳掺杂的Bi(2)Sr(2)CaCu(2)O(8+δ)（Tc = 91 K，E(res)= 42.4毫电子伏）。这一观察结果表明E(res)/k(B)Tc约为5.4的恒定比值，有助于解决关于高温超导体中共振自旋激发起源的长期争议。
