Protected nodes and the collapse of the Fermi arcs in high Tc cuprates

Abstract

Angle resolved photoemission on underdoped Bi2Sr2CaCu2O8 reveals that the magnitude and d-wave anisotropy of the superconducting state energy gap are independent of temperature all the way up to Tc. This lack of T variation of the entire k-dependent gap is in marked contrast to mean field theory. At Tc the point nodes of the d-wave gap abruptly expand into finite length ``Fermi arcs''. This change occurs within the width of the resistive transition, and thus the Fermi arcs are not simply thermally broadened nodes but rather a unique signature of the pseudogap phase.

Accepted by Phys. Rev. Lett

References in corpus (1)

• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates

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