期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 62, 期 1-2, 页码 47-51出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0022-3697(00)00099-8
关键词
oxides; superconductors; magnetic properties; metal-insulator transition; high-T(c); cuprates
Aspects of electron critical differentiation are clarified in the proximity of the Mott insulator. The flattening of the quasiparticle dispersion appears around momenta (pi ,0) and (0,pi) On Square lattices and determines the criticality of the metal-insulator transition with the suppressed coherence in that momentum region of quasiparticles. Such coherence suppression at the same time causes an instability to the superconducting state if a proper incoherent process is retained. The d-wave pairing interaction is generated from such retained processes without disturbance from the coherent single-particle excitations. Pseudogap phenomena widely observed in the underdoped cuprates are then naturally understood from the mode-mode coupling of d-wave superconducting (dSC) fluctuations with antiferromagnetic (AFM) ones. When we assume the existence of a strong d-wave pairing force repulsively competing with AFM fluctuations under the formation of flat and damped single-particle dispersion, we reproduce basic properties of the pseudogap seen in the magnetic resonance, neutron scattering, angle resolved photoemission and tunneling measurements in the cuprates. (C) 2000 Elsevier Science Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据