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

M. Plate·J. D. F. Mottershead·I. S. Elfimov·D. C. Peets·Ruixing Liang·D. A. Bonn·W. N. Hardy·S. Chiuzbaian·M. Falub·M. Shi·L. Patthey·A. Damascelli
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Abstract

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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M. Plate, J. D. F. Mottershead, I. S. Elfimov, D. C. Peets, Ruixing Liang, D. A. Bonn, W. N. Hardy, S. Chiuzbaian, M. Falub, M. Shi, L. Patthey, A. Damascelli. 2005-07-25. Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES. https://doi.org/10.1103/physrevlett.95.077001

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