期刊
PHYSICAL REVIEW B
卷 86, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.100508
关键词
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资金
- Center for Emergent Superconductivity, an Energy Frontier Research Center
- DOE Office of Science, Office of Basic Energy Science [DE-AC0298CH1088]
- Swiss National Science Foundation
We examine the dynamical magnetic response of underdoped cuprates by employing a phenomenological theory of a doped resonant valence bond state where the Fermi surface is truncated into four pockets. This theory predicts a resonant spin response which, with increasing energy (0 to 100 meV), appears as an hourglass. A very-low-energy spin response is found at (pi,pi +/- delta) and (pi +/- delta,pi) and is determined by scattering from the pockets' front side to the tips of opposite pockets where a van Hove singularity resides. At energies beyond 100 meV, strong scattering is seen from (pi,0) to (pi,pi). This theory thus provides a semiquantitative description of the spin response seen in both inelastic neutron scattering and resonant inelastic x-ray scattering experiments at all relevant energy scales.
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