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Shallow core levels, or how to determine the doping and Tc of Bi2 Sr2 CaCu2 O 8+δ and Bi2 Sr2 CuO 6+δ without cooling

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [2];  [2];  [2]
  1. Donostia International Physics Center (DIPC), San Sebastian (Spain); Brookhaven National Laboratory (BNL), Upton, NY (United States)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  3. Institut za fiziku, Zagreb (Croatia)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States); Princeton Univ., NJ (United States)
+ Show Author Affiliations

In this study, determining the doping level in high-temperature cuprate superconductors is crucial for understanding the origin of superconductivity in these materials and for unlocking their full potential. However, accurately determining the doping level remains a significant challenge due to a complex interplay of factors and limitations in various measurement techniques. In particular, in Bi2Sr2CuO6+δ and Bi2Sr2CaCu2O8+δ, where the mobile carriers are introduced by non-stoichiometric oxygen δ, the determination has been extremely problematic. Here, we study the doping dependence of the electronic structure of these materials in angle-resolved photoemission and find that both the doping level, p, and the superconducting transition temeprature, Tc can be precisely determined from the binding energy of the Bi 5d core-levels. The measurements can be performed at room temperature, enabling the determination of p and Tc without cooling the samples. This should be very helpful for further studies of these materials

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2396610
Alternate ID(s):
OSTI ID: 2473378
Report Number(s):
BNL--225803-2024-JAAM
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 22 Vol. 109; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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