Authors: C Castellani C Di Castro M Grilli
Publish Date: 2014/02/08
Volume: 103, Issue: 2, Pages: 137-144
Abstract
A scenario is presented in which the presence of a quantum critical point due to formation of incommensurate charge density waves accounts for the basic features of the high temperature superconducting cuprates both in the normal and in the superconducting states Specifically the singular interaction arising close to this chargedriven quantum critical point gives rise to the nonFermi liquid behavior universally found at optimal doping This interaction is also responsible for dwave Cooper pair formation with a superconducting critical temperature strongly dependent on doping in the overdoped region and with a plateau in the optimally doped region In the underdoped region a temperature dependent pairing potential favors local pair formation without superconducting coherence with a peculiar temperature dependence of the pseudogap and a nontrivial relation between the pairing temperature and the gap itself This last property is in good qualitative agreement with so far unexplained features of the experiments
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