462 citations · 6.7k across the 144 of their papers we have counts for
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Electronic structure of the putative room-temperature superconductor PbCu(PO)O
Liang Si, Karsten Held
A recent paper [Lee {\em et al.}, J. Korean Cryt. Growth Cryst. Techn. {\bf 33}, 61 (2023)] provides some experimental indications that PbCu(PO)O with $x\appro…
PbCu(PO)O: a Mott or charge transfer insulator in need of further doping for (super)conductivity
Liang Si, Markus Wallerberger, Andriy Smolyanyuk +3
We briefly review the status quo of research on the putative superconductor PbCu(PO)O also known as LK-99. Further, we provide {\em ab initio} derived tight-binding par…
No superconductivity in PbCu(PO)O found in orbital and spin fluctuation exchange calculations
Niklas Witt, Liang Si, Jan M. Tomczak +2
Finding a material that turns superconducting under ambient conditions has been the goal of over a century of research, and recently PbCu(PO)O aka LK-99 has be…
Absence of electron-phonon-mediated superconductivity in hydrogen-intercalated nickelates
Simone Di Cataldo, Paul Worm, Liang Si +1
A recent experiment [X. Ding et al., Nature 615, 50 (2023)] indicates that superconductivity in nickelates is restricted to a narrow window of hydrogen concentration: 0.22 < x < 0.…
Optimizing superconductivity: from cuprates via nickelates to palladates
Motoharu Kitatani, Liang Si, Paul Worm +3
Motivated by cuprate and nickelate superconductors, we perform a comprehensive study of the superconducting instability in the single-band Hubbard model. We calculate the spectrum…
Signatures of topotactic hydrogen in nickelate superconductors
Liang Si, Paul Worm, Karsten Held
Superconductivity has entered the nickel age marked by enormous experimental and theoretical efforts. Notwithstanding, synthesizing nickelate superconductors remains extremely chal…
Strongly correlated superconductivity with long-range spatial fluctuations
Motoharu Kitatani, Ryotaro Arita, Thomas Schäfer +1
We review recent studies for superconductivity using diagrammatic extensions of dynamical mean field theory. These approaches take into account simultaneously both, the local corre…
Phase diagram of nickelate superconductors calculated by dynamical vertex approximation
Karsten Held, Liang Si, Paul Worm +5
We review the electronic structure of nickelate superconductors with and without effects of electronic correlations. As a minimal model we identify the one-band Hubbard model for t…
Correlations turn electronic structure of finite-layer nickelates upside down
Paul Worm, Liang Si, Motoharu Kitatani +3
Motivated by the recent discovery of superconductivity in the pentalayer nickelate NdNiO [Nature Materials 10.1038], we calculate its electronic structure and superc…
Hidden, one-dimensional, strongly nested, and almost half-filled Fermi surface in BaCuO superconductors
Paul Worm, Motoharu Kitatani, Jan M. Tomczak +2
All previous cuprate superconductors display a set of common features: (i) vicinity to a Cu 3 configuration; (ii) separated CuO planes; (iii) superconductivity for dopin…
Nickelate superconductors -- a renaissance of the one-band Hubbard model
Motoharu Kitatani, Liang Si, Oleg Janson +3
Following the discovery of superconductivity in the cuprates and the seminal work by Anderson, the theoretical efforts to understand high-temperature superconductivity have been fo…
Why the critical temperature of high- cuprate superconductors is so low: The importance of the dynamical vertex structure
Motoharu Kitatani, Thomas Schäfer, Hideo Aoki +1
To fathom the mechanism of high-temperature () superconductivity, the dynamical vertex approximation (DA) is evoked for the two-dimensional repulsive Hubbard model. A…