title: Collapse of the normal-state pseudogap at a Lifshitz transition in the Bi(2)Sr(2)CaCu(2)O(8+δ) cuprate superconductor.
abstract: We report a fine tuned doping study of strongly overdoped Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals using electronic Raman scattering. Combined with theoretical calculations, we show that the doping, at which the normal-state pseudogap closes, coincides with a Lifshitz quantum phase transition where the active holelike Fermi surface becomes electronlike. This conclusion suggests that the microscopic cause of the pseudogap is sensitive to the Fermi surface topology. Furthermore, we find that the superconducting transition temperature is unaffected by this transition, demonstrating that their origins are different on the overdoped side.
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: S
authors.initials: S
authors.lastname: Benhabib
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: A
authors.initials: A
authors.lastname: Sacuto
authors.affiliation: Laboratoire de Physique des Solides, UMR 8502 CNRS, Université Paris Sud, Bâtiment 510, 91405 Orsay Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Civelli
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: I
authors.initials: I
authors.lastname: Paul
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: M
authors.initials: M
authors.lastname: Cazayous
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Gallais
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
authors.forename: M-A
authors.initials: MA
authors.lastname: Méasson
authors.affiliation: Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Zhong
authors.affiliation: Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
authors.forename: J
authors.initials: J
authors.lastname: Schneeloch
authors.affiliation: Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
authors.forename: G D
authors.initials: GD
authors.lastname: Gu
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: D
authors.initials: D
authors.lastname: Colson
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: A
authors.initials: A
authors.lastname: Forget