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

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

2007-12-10

arxiv.org/abs/0712.1253v3

Phys. Rev. B 78, 020513(R) (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, replaced with updated version

Scientific paper

10.1103/PhysRevB.78.020513

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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