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High-Energy Spin Dynamics in La$ {1.69}$Sr$ {0.31}$NiO$ 4$ by Bourges, P.; Sidis, Y.; Braden, M.; Nakajima, K.; Tranquada, J. M. is a scholarly article available to read on EtoBox.

What is High-Energy Spin Dynamics in La$ {1.69}$Sr$ {0.31}$NiO$ 4$ about?

We have mapped out the spin dynamics in a stripe-ordered nickelate, La$_{2-x}$Sr$_{x}$NiO$_{4}$ with $x \simeq 0.31$, using inelastic neutron scattering. We observe spin-wave excitations up to 80 meV emerging from the incommensurate magnetic peaks with an almost isotropic spin-velocity: $\hbar c_s\sim 0.32$ eV \AA, very similar to the velocity in the undoped, insulating parent compound, La$_{2}$NiO$_{4}$. We also discuss the similarities and differences of the inferred spin-excitation spectrum with those reported in superconducting high-$T_c$ cuprates.

Author

Bourges, P.; Sidis, Y.; Braden, M.; Nakajima, K.; Tranquada, J. M.

Published

2002

Language

EN