Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in
Journal Article
·
· Physical Review B
- Univ. of Paris Diderot, Paris (France). Lab.Matériaux et Phenomenes Quantiques
- Brookhaven National Lab. (BNL), Upton, NY (United States). Matter Physics and Materials Science
- IFW-Dresden, Dresden (Germany)
- Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
Here, 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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); German Research Foundation (DFG)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1462409
- Report Number(s):
- BNL--207881-2018-JAAM
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 17 Vol. 97; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ
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journal | November 2019 |
Thermodynamic signatures of quantum criticality in cuprate superconductors
|
journal | February 2019 |
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