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Publication . Article . 2012

Spin Dynamics in the Metallic State of 6+x

Sidis, Y.; Bourges, P.; Hennion, B.; Villeneuve, R.; Collin, G.; Marruco, J. F.;
Published: 25 Jan 2012
Publisher: World Scientific Pub Co Pte Lt
Abstract
Inelastic neutron scattering measurements have been carried out on a YBa2(Cu0.98-Zn0.02)3O 6+x single crystal in both underdoped (x = 0.7) and overdoped (x = 0.97) regimes. In the zinc substituted system, spin dynamics is drastically changed in respect to the pure compound: (i) the "resonance peak" almost vanishes, (ii) the spin gap is filled, (iii) new antiferromagnetic excitations are found at low energy. These new magnetic fluctuations, which persist in the normal state, account for a local enhancement of AF correlations around nonmagnetic impurities. Besides, it is worth emphasizing that features, not directly related to superconductivity, i.e., the contribution to the spin dynamics apart from the resonance peak and the "spin pseudo-gap" observed in the underdoped regime above T c , coexist with the new low energy magnetic fluctuations.
Subjects by Vocabulary

Microsoft Academic Graph classification: Antiferromagnetism Resonance (particle physics) Single crystal Inelastic neutron scattering Physics Impurity Condensed matter physics Superconductivity Spin-½ Spin polarization Atomic physics

arXiv: Condensed Matter::Strongly Correlated Electrons Condensed Matter::Superconductivity

Subjects

Condensed Matter Physics, Statistical and Nonlinear Physics

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