Direct Observation of k parallel to and k perpendicular to Stripe Excitations in La2-xSrxCuO4

作者：Sugai S^*; Tamai Y; Takayanagi Y; Hayamizu N; Muroi T

来源：Journal of Superconductivity and Novel Magnetism, 2012, 25(5): 1393-1397.

DOI：10.1007/s10948-012-1528-y

• Spin-charge stripe
• Separated dispersion curve
• High-temperature superconductor
• Two-magnon Raman scattering

The superconducting transition temperature in the cuprate is pointed to be enhanced by the self-organized spin-charge separated stripes. The magnetic excitations are very different in kayen and kaSyen stripes. Therefore if one detects the different excitations, it is a clear evidence of the stripe. Neutron scattering, however, always observes the mixed excitations. We first succeeded to detect the kaSyen stripe excitations of the separated dispersion induced by the super-lattice structure of the stripe in distinction from the kayen stripe excitations by two-magnon Raman scattering. The stripe structure is ubiquitous in the whole carrier density range at low temperatures.

• 出版日期2012-7