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Phase diagram of Bi2Sr2CaCu2O8+δ revisited

Journal Article · · Nature Communications
In cuprate superconductors, the doping of carriers into the parent Mott insulator induces superconductivity and various other phases whose characteristic temperatures are typically plotted versus the doping level p. In most materials, p cannot be determined from the chemical composition, but it is derived from the superconducting transition temperature, Tc, using the assumption that the Tc dependence on doping is universal. Here, we present angle-resolved photoemission studies of Bi2Sr2CaCu2O8+δ, cleaved and annealed in vacuum or in ozone to reduce or increase the doping from the initial value corresponding to Tc = 91 K. We show that p can be determined from the underlying Fermi surfaces and that in-situ annealing allows mapping of a wide doping regime, covering the superconducting dome and the non-superconducting phase on the overdoped side. Our results show a surprisingly smooth dependence of the inferred Fermi surface with doping. In the highly overdoped regime, the superconducting gap approaches the value of 2Δ0 = (4 ± 1)kBTc.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-98CH10886; SC0012704
OSTI ID:
1488523
Report Number(s):
BNL--209816-2018-JAAM
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (13)

High-Temperature Superconductors as Ionic Metals journal October 2019
Disappearance of superconductivity due to vanishing coupling in the overdoped Bi$$_{2}$$2Sr$$_{2}$$2CaCu$$_{2}$$2O$$_{8+\delta }$$8+δ journal January 2020
Crossover from two-dimensional to three-dimensional superconducting states in bismuth-based cuprate superconductor journal December 2019
Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices journal January 2020
Crossover to strange metal phase: quantum criticality in one unit cell Bi 2 Sr 2 CaCu 2 O$_{8+{\rm x}}$ journal October 2019
Anomalies in the pseudogap phase of the cuprates: competing ground states and the role of umklapp scattering journal October 2019
Reconstruction of the Bi 2 Sr 2 CaCu 2 O 8 + δ Fermi surface journal December 2019
Combined spectroscopic imaging STM and ARPES study of different gaps measured in the cuprate phase diagram journal January 2020
Low-energy antiferromagnetic spin fluctuations limit the coherent superconducting gap in cuprates journal December 2018
Unusual behavior of cuprates explained by heterogeneous charge localization journal January 2019
Incoherent strange metal sharply bounded by a critical doping in Bi2212 journal November 2019
Low-energy antiferromagnetic spin fluctuations limit the coherent superconducting gap in cuprates text January 2018
Dirac energy spectrum and inverted band gap in metamorphic InAsSb/InSb superlattices text January 2019

Figures / Tables (5)


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