Abstract
We present a neutron-scattering study of the static and dynamic spin correlations in the underdoped high-temperature superconductor 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.
- Received 21 January 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.017001
©2009 American Physical Society