Faculty Publications

Title

Reconstructed Fermi surface of underdoped Bi2Sr 2CaCu2O8+δ cuprate superconductors

Document Type

Article

Journal/Book/Conference Title

Physical Review Letters

Volume

107

Issue

4

Abstract

The Fermi surface topologies of underdoped samples of the high-T c superconductor Bi2Sr2CaCu2O 8+δ have been measured with angle resolved photoemission. By examining thermally excited states above the Fermi level, we show that the observed Fermi surfaces in the pseudogap phase are actually components of fully enclosed hole pockets. The spectral weight of these pockets is vanishingly small at the magnetic zone boundary, creating the illusion of Fermi "arcs." The area of the pockets as measured in this study is consistent with the doping level, and hence carrier density, of the samples measured. Furthermore, the shape and area of the pockets is well reproduced by phenomenological models of the pseudogap phase as a spin liquid. © 2011 American Physical Society.

Original Publication Date

7-20-2011

DOI of published version

10.1103/PhysRevLett.107.047003

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