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Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in Bi2Sr2CaCu2O8+δ

DOI: 10.1103/PhysRevB.97.174521 DOI Help

Authors: B. Loret (Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7) , Y. Gallais (Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7) , M. Cazayous (Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7) , R. D. Zhong (Brookhaven National Laboratory (BNL)) , J. Schneeloch (Brookhaven National Laboratory (BNL)) , G. D. Gu (Brookhaven National Laboratory (BNL)) , A. Fedorov (IFW Dresden) , T. K. Kim (Diamond Light Source) , S. Borisenko (IFW-Dresden) , A. Sacuto (Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 97

State: Published (Approved)
Published: May 2018
Diamond Proposal Number(s): 17045

Abstract: We study the behavior of the pseudogap in overdoped Bi2Sr2CaCu2O8+δ by electronic Raman scattering (ERS) and angle-resolved photoemission spectroscopy (ARPES) on the same single crystals. Using both techniques we find that, unlike the superconducting gap, the pseudogap related to the antibonding band vanishes above the critical doping pc=0.22. Concomitantly, we show from ARPES measurements that the Fermi surface of the antibonding band is holelike below pc and becomes electronlike above pc. This reveals that the existence of the pseudogap depends on the Fermi surface topology in Bi2Sr2CaCu2O8+δ, and more generally, puts strong constraint on theories of the pseudogap phase.

Journal Keywords: Fermi surface; Pseudogap; Superconductivity; Cuprates; Unconventional superconductors; Angle-resolved photoemission spectroscopy; Raman spectroscopy

Subject Areas: Physics, Materials


Instruments: I05-ARPES

Other Facilities: BESSY

Added On: 04/06/2018 14:45

Discipline Tags:

Materials Science Quantum Materials Superconductors Physics Hard condensed matter - electronic properties

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)