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Published on: March 24, 2019
Charge orders, magnetism and pairings in the cuprate superconductors
T Kloss1, X Montiel1, V S de Carvalho2
1IPhT, L'Orme des Merisiers, CEA-Saclay, 91191 Gif-sur-Yvette, France.
Abstract:
We review the recent developments in the field of cuprate superconductors with special focus on the recently observed charge order in the underdoped compounds. We introduce new theoretical developments following the study of the antiferromagnetic quantum critical point in two dimensions, in which preemptive orders in both charge and superconducting (SC) sectors emerge, that are in turn related by an SU(2) symmetry. We consider the implications of this proliferation of orders in the underdoped region, and provide a study of the type of fluctuations which characterize the SU(2) symmetry. We identify an intermediate energy scale where the SC fluctuations are dominant and argue that they are unstable towards the formation of a resonant excitonic state at the pseudogap temperature T (*). We discuss the implications of this scenario for a few key experiments.
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