Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES

Details Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES

2005-03-05

arxiv.org/abs/cond-mat/0503117v3

PRL 95, 077001 (2005)

Physics

Condensed Matter

Superconductivity

Revised manuscript, in press on PRL. A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUB

Scientific paper

10.1103/PhysRevLett.95.077001

The electronic structure of the high-T_c superconductor Tl2Ba2CuO6+d is studied by ARPES. For a very overdoped Tc=30K sample, the Fermi surface consists of a single large hole pocket centered at (pi,pi) and is approaching a topological transition. Although a superconducting gap with d_x^2-y^2 symmetry is tentatively identified, the quasiparticle evolution with momentum and binding energy exhibits a marked departure from the behavior observed in under and optimally doped cuprates. The relevance of these findings to scattering, many-body, and quantum-critical phenomena is discussed.

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