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Evidence for an incommensurate magnetic resonance in La(2-x)Sr(x)CuO(4)

J. M. Tranquada·C. H. Lee·K. Yamada·Y. S. Lee·L. P. Regnault·H. M. Ronnow
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Abstract

We study the effect of a magnetic field (applied along the c-axis) on the low-energy, incommensurate magnetic fluctuations in superconducting La(1.82)Sr(0.18)CuO(4). The incommensurate peaks at 9 meV, which in zero-field were previously shown to sharpen in q on cooling below T_c [T. E. Mason et al., Phys. Rev. Lett. 77, 1604 (1996)], are found to broaden in q when a field of 10 T is applied. The applied field also causes scattered intensity to shift into the spin gap. We point out that the response at 9 meV, though occurring at incommensurate wave vectors, is comparable to the commensurate magnetic resonance observed at higher energies in other cuprate superconductors.

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J. M. Tranquada, C. H. Lee, K. Yamada, Y. S. Lee, L. P. Regnault, H. M. Ronnow. 2003-10-10. Evidence for an incommensurate magnetic resonance in La(2-x)Sr(x)CuO(4). https://doi.org/10.1103/physrevb.69.174507

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