Physics – Condensed Matter – Superconductivity
Scientific paper
2003-10-10
Phys. Rev. B 69, 174507 (2004)
Physics
Condensed Matter
Superconductivity
8 pages, including 4 figures
Scientific paper
10.1103/PhysRevB.69.174507
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.
Lee Chang Hoon
Lee Young Sam
Regnault Louis-Pierre
Ronnow Henrik M.
Tranquada John M.
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