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Phenomenological theory of the protected nodes and collapse of the Fermi arcs in underdoped cuprate superconductors

Qijin Chen, K. Levin

DOI 10.1103/PhysRevB.78.020513 · Physical Review B

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Abstract

We show how recent angle resolved photoemission measurements addressing the Fermi arcs in the cuprates reveal a very natural phenomenological description of the complex superfluid phase. Importantly, this phenomenology is consistent with a previously presented microscopic theory. By distinguishing the order parameter and the excitation gap, we are able to demonstrate how the collapse of the arcs below Tc into well defined nodes is associated with the smooth emergence of superconducting coherence. Comparison of this theory with experiment shows good semiquantitative agreement.

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FormulaReported Tc (K)Pressure (GPa)Type
Bi2Sr2CaCu2O8

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—Pressure not reportedunknown

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