The magnetic nature of superconductivity in doped cuprates

Details The magnetic nature of superconductivity in doped cuprates The magnetic nature of superconductivity in doped cuprates

2004-07-13

arxiv.org/abs/cond-mat/0407310v4

Physica C436, 14 (2006)

Physics

Condensed Matter

Superconductivity

12 pages, 7 figures; Added discussions and update references, accepted for publication in Physica C

Scientific paper

10.1016/j.physc.2006.01.001

Within the kinetic energy driven superconducting mechanism, the magnetic nature of cuprate superconductors is discussed. It is shown that the superconducting state is controlled by both charge carrier gap function and quasiparticle coherent weight. This quasiparticle coherent weight grows linearly with the hole doping concentration in the underdoped and optimally doped regimes, and then decreases with doping in the overdoped regime, which leads to that the maximal superconducting transition temperature occurs around the optimal doping, and then decreases in both underdoped and overdoped regimes. Within this framework, we calculate the dynamical spin structure factor of cuprate superconductors, and reproduce all main features of inelastic neutron scattering experiments, including the energy dependence of the incommensurate magnetic scattering at both low and high energies and commensurate resonance at intermediate energy.

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