Evidence for an incommensurate magnetic resonance in La2-xSrxCuO4

We study the effect of a magnetic field (applied along the c axis) on the low-energy, incommensurate magnetic fluctuations in superconducting La1.82Sr0.18CuO4. 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 , 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.

Published in:
Physical Review B, 69, 17, 174507
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan. MIT, Dept Phys, Cambridge, MA 02139 USA. CEA Grenoble, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France. Tranquada, JM, Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.

 Record created 2007-01-24, last modified 2018-03-17

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