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Dynamically screened Coulomb interaction in the parent compounds of hole-doped cuprates : Trends and exceptions

Nilsson, F. LU ; Karlsson, K. and Aryasetiawan, F. LU (2019) In Physical Review B 99(7).
Abstract

Although cuprate high-temperature superconductors were discovered already in 1986 the origin of the pairing mechanism remains elusive. While the doped compounds are superconducting with high transition temperatures Tc, the undoped compounds are insulating due to the strong effective Coulomb interaction between the Cu 3d holes. We investigate the dependence of the maximum superconducting transition temperature Tcmax on the on-site effective Coulomb interaction U using the constrained random-phase approximation. We focus on the commonly used one-band model of the cuprates, including only the antibonding combination of the Cu dx2-y2 and O px and py orbitals and find a screening-dependent trend between the static value of U and Tcmax for... (More)

Although cuprate high-temperature superconductors were discovered already in 1986 the origin of the pairing mechanism remains elusive. While the doped compounds are superconducting with high transition temperatures Tc, the undoped compounds are insulating due to the strong effective Coulomb interaction between the Cu 3d holes. We investigate the dependence of the maximum superconducting transition temperature Tcmax on the on-site effective Coulomb interaction U using the constrained random-phase approximation. We focus on the commonly used one-band model of the cuprates, including only the antibonding combination of the Cu dx2-y2 and O px and py orbitals and find a screening-dependent trend between the static value of U and Tcmax for the parent compounds of a large number of hole-doped cuprates. Our results suggest that superconductivity may be favored by a large on-site Coulomb repulsion. We analyze both the trend in the static value of U and its frequency dependence in detail and, by comparing our results to other works, speculate on the mechanisms behind the trend.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
99
issue
7
article number
075135
publisher
American Physical Society
external identifiers
  • scopus:85061980861
ISSN
2469-9950
DOI
10.1103/PhysRevB.99.075135
language
English
LU publication?
yes
id
75f27f82-e767-4f6b-b672-f7a3f5963936
date added to LUP
2019-03-06 12:38:01
date last changed
2020-02-19 05:21:50
@article{75f27f82-e767-4f6b-b672-f7a3f5963936,
  abstract     = {<p>Although cuprate high-temperature superconductors were discovered already in 1986 the origin of the pairing mechanism remains elusive. While the doped compounds are superconducting with high transition temperatures Tc, the undoped compounds are insulating due to the strong effective Coulomb interaction between the Cu 3d holes. We investigate the dependence of the maximum superconducting transition temperature Tcmax on the on-site effective Coulomb interaction U using the constrained random-phase approximation. We focus on the commonly used one-band model of the cuprates, including only the antibonding combination of the Cu dx2-y2 and O px and py orbitals and find a screening-dependent trend between the static value of U and Tcmax for the parent compounds of a large number of hole-doped cuprates. Our results suggest that superconductivity may be favored by a large on-site Coulomb repulsion. We analyze both the trend in the static value of U and its frequency dependence in detail and, by comparing our results to other works, speculate on the mechanisms behind the trend.</p>},
  author       = {Nilsson, F. and Karlsson, K. and Aryasetiawan, F.},
  issn         = {2469-9950},
  language     = {eng},
  month        = {02},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review B},
  title        = {Dynamically screened Coulomb interaction in the parent compounds of hole-doped cuprates : Trends and exceptions},
  url          = {http://dx.doi.org/10.1103/PhysRevB.99.075135},
  doi          = {10.1103/PhysRevB.99.075135},
  volume       = {99},
  year         = {2019},
}