Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO - Archive ouverte HAL
Article Dans Une Revue SciPost Physics Année : 2023

Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO

Résumé

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.
Fichier principal
Vignette du fichier
pdf.pdf (3.14 Mo) Télécharger le fichier
Origine Publication financée par une institution

Dates et versions

hal-03852090 , version 1 (23-12-2023)

Licence

Identifiants

Citer

Max Bramberger, Benjamin Bacq-Labreuil, Martin Grundner, Silke Biermann, Ulrich Schollwöck, et al.. Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO. SciPost Physics, 2023, 14 (1), pp.010. ⟨10.21468/SciPostPhys.14.1.010⟩. ⟨hal-03852090⟩
78 Consultations
23 Téléchargements

Altmetric

Partager

More