Magnetic-Field-Enhanced Incommensurate Magnetic Order in the Underdoped High-Temperature Superconductor YBa2Cu3O6.45

Haug, D.; Hinkov, V.; Suchaneck, A.; Inosov, D. S.; Christensen, N. B.; Niedermayer, Ch.; Bourges, P.; Sidis, Y.; Park, J. T.; Ivanov, A.; Lin, C. T.; Mesot, J.; Keimer, B.

doi:10.1103/PhysRevLett.103.017001

Haug, D.; Hinkov, V.; Suchaneck, A.; Inosov, D. S.; Christensen, N. B.; Niedermayer, Ch.; Bourges, P.; Sidis, Y.; Park, J. T.; Ivanov, A.; Lin, C. T.; Mesot, J.; Keimer, B.

2009

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Résumé

We present a neutron-scattering study of the static and dynamic spin correlations in the underdoped high-temperature superconductor YBa2Cu3O6.45 in magnetic fields up to 15 T. The field strongly enhances static incommensurate magnetic order at low temperatures and induces a spectral-weight shift in the magnetic-excitation spectrum. A reconstruction of the Fermi surface driven by the field-enhanced magnetic superstructure may thus be responsible for the unusual Fermi surface topology revealed by recent quantum-oscillation experiments.