Formation of CuO2 sublattices by suppression of interlattice correlations in tetragonal CuO
(2023) In SciPost Physics 14(1).- Abstract
We investigate the tetragonal phase of the binary transition metal oxide CuO (t-CuO) within the context of cellular dynamical mean-field theory. Due to its strong antiferromagnetic correlations and simple structure, analysing the physics of t-CuO is of high interest as it may pave the way towards a more complete understanding of high-temperature superconductivity in hole-doped antiferromagnets. In this work we give a formal justification for the weak-coupling assumption that has previously been made for the interconnected sublattices within a single layer of t-CuO by studying the non-local self-energies of the system. We compute momentum-resolved spectral functions using a Matrix Product State (MPS)-based impurity solver directly on the... (More)
We investigate the tetragonal phase of the binary transition metal oxide CuO (t-CuO) within the context of cellular dynamical mean-field theory. Due to its strong antiferromagnetic correlations and simple structure, analysing the physics of t-CuO is of high interest as it may pave the way towards a more complete understanding of high-temperature superconductivity in hole-doped antiferromagnets. In this work we give a formal justification for the weak-coupling assumption that has previously been made for the interconnected sublattices within a single layer of t-CuO by studying the non-local self-energies of the system. We compute momentum-resolved spectral functions using a Matrix Product State (MPS)-based impurity solver directly on the real axis, which does not require any numerically ill-conditioned analytic continuation. The agreement with photoemission spectroscopy indicates that a single-band Hubbard model is sufficient to capture the material’s low energy physics. We perform calculations on a range of different temperatures, finding two magnetic regimes, for which we identify the driving mechanism behind their respective insulating state. Finally, we show that in the hole-doped regime the sublattice structure of t-CuO has interesting consequences on the symmetry of the superconducting state.
(Less)
- author
- Bramberger, Max ; Bacq-Labreuil, Benjamin ; Grundner, Martin ; Biermann, Silke LU ; Schollwöck, Ulrich ; Paeckel, Sebastian and Lenz, Benjamin
- organization
- publishing date
- 2023-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- SciPost Physics
- volume
- 14
- issue
- 1
- article number
- 010
- publisher
- SciPost
- external identifiers
-
- scopus:85156111195
- ISSN
- 2542-4653
- DOI
- 10.21468/SciPostPhys.14.1.010
- language
- English
- LU publication?
- yes
- id
- 7d630c89-b064-45c9-9c47-0967b1658b12
- date added to LUP
- 2023-08-16 13:24:38
- date last changed
- 2025-04-04 14:29:06
@article{7d630c89-b064-45c9-9c47-0967b1658b12,
abstract = {{<p>We investigate the tetragonal phase of the binary transition metal oxide CuO (t-CuO) within the context of cellular dynamical mean-field theory. Due to its strong antiferromagnetic correlations and simple structure, analysing the physics of t-CuO is of high interest as it may pave the way towards a more complete understanding of high-temperature superconductivity in hole-doped antiferromagnets. In this work we give a formal justification for the weak-coupling assumption that has previously been made for the interconnected sublattices within a single layer of t-CuO by studying the non-local self-energies of the system. We compute momentum-resolved spectral functions using a Matrix Product State (MPS)-based impurity solver directly on the real axis, which does not require any numerically ill-conditioned analytic continuation. The agreement with photoemission spectroscopy indicates that a single-band Hubbard model is sufficient to capture the material’s low energy physics. We perform calculations on a range of different temperatures, finding two magnetic regimes, for which we identify the driving mechanism behind their respective insulating state. Finally, we show that in the hole-doped regime the sublattice structure of t-CuO has interesting consequences on the symmetry of the superconducting state.</p>}},
author = {{Bramberger, Max and Bacq-Labreuil, Benjamin and Grundner, Martin and Biermann, Silke and Schollwöck, Ulrich and Paeckel, Sebastian and Lenz, Benjamin}},
issn = {{2542-4653}},
language = {{eng}},
number = {{1}},
publisher = {{SciPost}},
series = {{SciPost Physics}},
title = {{Formation of CuO<sub>2</sub> sublattices by suppression of interlattice correlations in tetragonal CuO}},
url = {{http://dx.doi.org/10.21468/SciPostPhys.14.1.010}},
doi = {{10.21468/SciPostPhys.14.1.010}},
volume = {{14}},
year = {{2023}},
}