The influence of pseudogap on the inelastic neutron scattering spectra of the underdoped lanthanum cuprate is studied on the basis of the model which incorporates both the superconducting state and pscudogap state.It ...The influence of pseudogap on the inelastic neutron scattering spectra of the underdoped lanthanum cuprate is studied on the basis of the model which incorporates both the superconducting state and pscudogap state.It is found that the striking effects of the influence of the pseudogap on the incommensurability of the spin excitation spectrum are that in the superconducting state the pseudogap makes the intensity of the incommensurate peak increase,in the normal state the pseudogap not only makes the intensity of the incommensurate peak increase,but also sharpens the incommensurate peak and increases incommensurability.展开更多
A theory of the c-axis infrared conductivity of a dx2-y2 -wave superconductor due to the competition betweenthe interlayer direct hopping and the hopping assisted by the spin fluctuations has been developed. The predi...A theory of the c-axis infrared conductivity of a dx2-y2 -wave superconductor due to the competition betweenthe interlayer direct hopping and the hopping assisted by the spin fluctuations has been developed. The prediction ofourtheory captures the main feature of the experiment. Thus we argue that the anomalous behavior of the c-axis infraredconductivity of the underdoped cuprates in superconducting state may be properly understood within the theory.展开更多
文摘The influence of pseudogap on the inelastic neutron scattering spectra of the underdoped lanthanum cuprate is studied on the basis of the model which incorporates both the superconducting state and pscudogap state.It is found that the striking effects of the influence of the pseudogap on the incommensurability of the spin excitation spectrum are that in the superconducting state the pseudogap makes the intensity of the incommensurate peak increase,in the normal state the pseudogap not only makes the intensity of the incommensurate peak increase,but also sharpens the incommensurate peak and increases incommensurability.
文摘A theory of the c-axis infrared conductivity of a dx2-y2 -wave superconductor due to the competition betweenthe interlayer direct hopping and the hopping assisted by the spin fluctuations has been developed. The prediction ofourtheory captures the main feature of the experiment. Thus we argue that the anomalous behavior of the c-axis infraredconductivity of the underdoped cuprates in superconducting state may be properly understood within the theory.