Dynamically screened Coulomb interaction in the parent compounds of hole-doped cuprates : Trends and exceptions
(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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- author
- Nilsson, F. LU ; Karlsson, K. and Aryasetiawan, F. LU
- organization
- publishing date
- 2019-02-19
- 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
- 2022-04-25 21:37:06
@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}}, }