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Title: Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in Bi 2 Sr 2 CaCu 2 O 8 + δ

Here, we study the behavior of the pseudogap in overdoped Bi 2Sr 2CaCu 2O 8+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 p c = 0.22 . Concomitantly, we show from ARPES measurements that the Fermi surface of the antibonding band is holelike below p c and becomes electronlike above p c. This reveals that the existence of the pseudogap depends on the Fermi surface topology in Bi 2Sr 2CaCu 2O 8+δ, and more generally, puts strong constraint on theories of the pseudogap phase.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ; ORCiD logo [2] ;  [3] ;  [4] ;  [3] ;  [1]
  1. Univ. of Paris Diderot, Paris (France). Lab.Matériaux et Phenomenes Quantiques
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Matter Physics and Materials Science
  3. IFW-Dresden, Dresden (Germany)
  4. Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
Publication Date:
Report Number(s):
BNL-207881-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); German Research Foundation (DFG)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1462409