On the Reconstructed Fermi Surface in the Underdoped Cuprates

Details On the Reconstructed Fermi Surface in the Underdoped Cuprates On the Reconstructed Fermi Surface in the Underdoped Cuprates

2010-08-18

arxiv.org/abs/1008.3121v2

Phys. Rev. Lett. 107, 047003 (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures. Submitted to Physics Review Letters

Scientific paper

10.1103/PhysRevLett.107.047003

The Fermi surface topologies of underdoped samples the high-Tc superconductor Bi2212 have been measured with angle resolved photoemission. By examining thermally excited states above the Fermi level, we show that the Fermi surfaces in the pseudogap phase of underdoped samples are actually composed of fully enclosed hole pockets. The spectral weight of these pockets is vanishingly small at the anti-ferromagnetic zone boundary, which creates the illusion of Fermi "arcs" in standard photoemission measurements. 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 a phenomenological model of the pseudogap phase as a spin liquid.

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