Understanding the Protected Nodes and Collapse of the Fermi Arcs in Underdoped Cuprate Superconductors

Qijin Chen; K. Levin

doi:10.1103/physrevb.78.020513

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arXiv · 0712.1253

Understanding the Protected Nodes and Collapse of the Fermi Arcs in Underdoped Cuprate Superconductors

Qijin Chen·K. Levin

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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 $T_c$ into well defined nodes is associated with the \emph{smooth} emergence of superconducting coherence. Comparison of this theory with experiment shows good semi-quantitative agreement.

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Qijin Chen, K. Levin. 2008-08-01. Understanding the Protected Nodes and Collapse of the Fermi Arcs in Underdoped Cuprate Superconductors. https://doi.org/10.1103/physrevb.78.020513

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