Quantitative theory of magnetic interactions in solids

A Szilva, Y Kvashnin, EA Stepanov, L Nordström… - Reviews of Modern …, 2023 - APS
This review addresses the method of explicit calculations of interatomic exchange
interactions of magnetic materials. This involves exchange mechanisms normally referred to …

[HTML][HTML] Superconductivity in high-Tc and related strongly correlated systems from variational perspective: Beyond mean field theory

J Spałek, M Fidrysiak, M Zegrodnik, A Biborski - Physics Reports, 2022 - Elsevier
The principal purpose of this topical review is to single out some of the universal features of
high-temperature (high-T c) and related strongly-correlated systems, which can be …

Tracking the footprints of spin fluctuations: A multimethod, multimessenger study of the two-dimensional Hubbard model

T Schäfer, N Wentzell, F Šimkovic IV, YY He, C Hille… - Physical Review X, 2021 - APS
The Hubbard model represents the fundamental model for interacting quantum systems and
electronic correlations. Using the two-dimensional half-filled Hubbard model at weak …

: Quasiparticle self-consistent with ladder diagrams in

B Cunningham, M Grüning, D Pashov… - Physical Review B, 2023 - APS
We present an extension of the quasiparticle self-consistent GW approximation (QS GW)[T.
Kotani, Phys. Rev. B 76, 165106 (2007) 10.1103/PhysRevB. 76.165106] to include vertex …

Charge density wave ordering in NdNiO2: effects of multiorbital nonlocal correlations

EA Stepanov, M Vandelli, AI Lichtenstein… - npj Computational …, 2024 - nature.com
In this work, we investigate collective electronic fluctuations and, in particular, the possibility
of the charge density wave ordering in an infinite-layer NdNiO2. We perform advanced many …

Coexisting charge density wave and ferromagnetic instabilities in monolayer InSe

EA Stepanov, V Harkov, M Rösner… - npj Computational …, 2022 - nature.com
Recently fabricated InSe monolayers exhibit remarkable characteristics that indicate the
potential of this material to host a number of many-body phenomena. In this work, we …

Eliminating orbital selectivity from the metal-insulator transition by strong magnetic fluctuations

EA Stepanov - Physical Review Letters, 2022 - APS
The orbital-selective electronic behavior is one of the most remarkable manifestations of
strong electronic correlations in multiorbital systems. A prominent example is the orbital …

Fingerprints of the local moment formation and its Kondo screening in the generalized susceptibilities of many-electron problems

P Chalupa, T Schäfer, M Reitner, D Springer… - Physical Review Letters, 2021 - APS
We identify the precise hallmarks of the local magnetic moment formation and its Kondo
screening in the frequency structure of the generalized charge susceptibility. The sharpness …

Doping-dependent charge-and spin-density wave orderings in a monolayer of Pb adatoms on Si (111)

M Vandelli, A Galler, A Rubio, AI Lichtenstein… - npj Quantum …, 2024 - nature.com
In this work we computed the phase diagram as a function of temperature and doping for a
system of lead adatoms allocated periodically on a silicon (111) surface. This Si (111): Pb …

Attractive effect of a strong electronic repulsion: The physics of vertex divergences

M Reitner, P Chalupa, L Del Re, D Springer, S Ciuchi… - Physical Review Letters, 2020 - APS
While the breakdown of the perturbation expansion for the many-electron problem has
several formal consequences, here we unveil its physical effect: flipping the sign of the …