Evidence for an incommensurate magnetic resonance in La2xSrxCuO4

J. M. Tranquada, C. H. Lee, K. Yamada, Y. S. Lee, L. P. Regnault, and H. M. Rønnow
Phys. Rev. B 69, 174507 – Published 28 May 2004
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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 La1.82Sr0.18CuO4. The incommensurate peaks at 9 meV, which in zero field were previously shown to sharpen in q on cooling below Tc [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.

  • Received 9 October 2003

DOI:https://doi.org/10.1103/PhysRevB.69.174507

©2004 American Physical Society

Authors & Affiliations

J. M. Tranquada1, C. H. Lee2, K. Yamada3, Y. S. Lee4, L. P. Regnault5, and H. M. Rønnow5

  • 1Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 2National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
  • 3Institute for Chemical Research, Kyoto University, Gokashou, Uji, 611-0011 Kyoto, Japan
  • 4Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 5CEA/Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, 38054 Grenoble cedex 9, France

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Vol. 69, Iss. 17 — 1 May 2004

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