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Title: Cuprate phase diagram and the influence of nanoscale inhomogeneities

Abstract

The phase diagram associated with high-T c superconductors is complicated by an array of different ground states. The parent material represents an antiferromagnetic insulator but with doping superconductivity becomes possible with transition temperatures previously thought unattainable. The underdoped region of the phase diagram is dominated by the so-called pseudogap phenomena, whereby in the normal state the system mimics superconductivity in its spectral response but does not show the complete loss of resistivity associated with the superconducting state. An understanding of this regime presents one of the great challenges for the field. In the present study we revisit the structure of the phase diagram as determined in photoemission studies. By careful analysis of the role of nanoscale inhomogeneities in the overdoped region, we are able to more carefully separate out the gaps due to the pseudogap phenomena from the gaps due to the superconducting transition. Within a mean-field description, we are thus able to link the magnitude of the doping-dependent pseudogap directly to the Heisenberg exchange interaction term, JΣs is j, contained in the t-J model. This approach provides a clear indication that the pseudogap is associated with spin singlet formation.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1433995
Alternate Identifier(s):
OSTI ID: 1410475
Report Number(s):
BNL-203545-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1802816
Grant/Contract Number:  
SC0012704; AC02-98CH10886; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Zaki, Nader, Yang, Hongbo -B., Rameau, Jon D., Johnson, Peter D., Claus, Helmut, and Hinks, David G. Cuprate phase diagram and the influence of nanoscale inhomogeneities. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.195163.
Zaki, Nader, Yang, Hongbo -B., Rameau, Jon D., Johnson, Peter D., Claus, Helmut, & Hinks, David G. Cuprate phase diagram and the influence of nanoscale inhomogeneities. United States. doi:10.1103/PhysRevB.96.195163.
Zaki, Nader, Yang, Hongbo -B., Rameau, Jon D., Johnson, Peter D., Claus, Helmut, and Hinks, David G. Tue . "Cuprate phase diagram and the influence of nanoscale inhomogeneities". United States. doi:10.1103/PhysRevB.96.195163. https://www.osti.gov/servlets/purl/1433995.
@article{osti_1433995,
title = {Cuprate phase diagram and the influence of nanoscale inhomogeneities},
author = {Zaki, Nader and Yang, Hongbo -B. and Rameau, Jon D. and Johnson, Peter D. and Claus, Helmut and Hinks, David G.},
abstractNote = {The phase diagram associated with high-Tc superconductors is complicated by an array of different ground states. The parent material represents an antiferromagnetic insulator but with doping superconductivity becomes possible with transition temperatures previously thought unattainable. The underdoped region of the phase diagram is dominated by the so-called pseudogap phenomena, whereby in the normal state the system mimics superconductivity in its spectral response but does not show the complete loss of resistivity associated with the superconducting state. An understanding of this regime presents one of the great challenges for the field. In the present study we revisit the structure of the phase diagram as determined in photoemission studies. By careful analysis of the role of nanoscale inhomogeneities in the overdoped region, we are able to more carefully separate out the gaps due to the pseudogap phenomena from the gaps due to the superconducting transition. Within a mean-field description, we are thus able to link the magnitude of the doping-dependent pseudogap directly to the Heisenberg exchange interaction term, JΣsisj, contained in the t-J model. This approach provides a clear indication that the pseudogap is associated with spin singlet formation.},
doi = {10.1103/PhysRevB.96.195163},
journal = {Physical Review B},
number = 19,
volume = 96,
place = {United States},
year = {2017},
month = {11}
}

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    Works referencing / citing this record:

    Universal superconducting precursor in three classes of unconventional superconductors
    journal, June 2019


    Universal superconducting precursor in three classes of unconventional superconductors
    journal, June 2019