Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO
| Autor: | Bramberger, Max, Bacq-Labreuil, Benjamin, Grundner, Martin, Biermann, Silke, Schollwöck, Ulrich, Paeckel, Sebastian, Lenz, Benjamin |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | SciPost Phys. 14, 010 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.21468/SciPostPhys.14.1.010 |
| Popis: | 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. Comment: 30 pages, 11 figures |
| Databáze: | arXiv |
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