Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Lichtenstein, Alexander"'
Publikováno v:
npj Comput. Mater. 10, 108 (2024)
In this work, we investigate collective electronic fluctuations and, in particular, the possibility of the charge density wave ordering in an infinite-layer NdNiO$_2$. We perform advanced many-body calculations for the ab-initio three-orbital model b
Externí odkaz:
http://arxiv.org/abs/2311.09983
Autor:
Witt, Niklas, Nomura, Yusuke, Brener, Sergey, Arita, Ryotaro, Lichtenstein, Alexander I., Wehling, Tim O.
Superconductivity emerges from the spatial coherence of a macroscopic condensate of Cooper pairs. Increasingly strong binding and localization of electrons into these pairs compromises the condensate's phase stiffness, thereby limiting critical tempe
Externí odkaz:
http://arxiv.org/abs/2310.09063
Autor:
Kapcia, Konrad J., Tkachenko, Victor, Capotondi, Flavio, Lichtenstein, Alexander, Molodtsov, Serguei, Piekarz, Przemysław, Ziaja, Beata
Publikováno v:
Scientific Reports 14, 473 (2024)
Studies of light-induced demagnetization started with the experiment performed by Beaupaire et al. on nickel. Here, we present theoretical predictions for X-ray induced demagnetization of nickel, with X-ray photon energies tuned to its $M_3$ and $L_3
Externí odkaz:
http://arxiv.org/abs/2307.04671
The electronic structure and magnetism of individual Dy atom adsorbed on the MgO(001) substrate is investigated using the combination of the density functional theory with the Hubbard-I approximation to the Anderson impurity model (DFT+U(HIA)). The d
Externí odkaz:
http://arxiv.org/abs/2306.08415
Autor:
Noei, Neda, Mozara, Roberto, Montero, Ana M., Brinker, Sascha, Ide, Niklas, Guimarães, Filipe S. M., Lichtenstein, Alexander I., Berndt, Richard, Lounis, Samir, Weismann, Alexander
The zero-bias anomaly in conductance spectra of single Co atoms on Cu(111) observed at $\approx$ 4 K, which has been interpreted as being due to a Kondo resonance, is strongly modified when the Co atoms are attached to monatomic Cu chains. Scanning t
Externí odkaz:
http://arxiv.org/abs/2303.03317
We develop a strong-coupling perturbation scheme for a generic Hubbard model around a half-filled particle-hole-symmetric reference system, which is free from the fermionic sign problem. The approach is based on the lattice determinantal Quantum Mont
Externí odkaz:
http://arxiv.org/abs/2303.01607
Autor:
Vandelli, Matteo, Galler, Anna, Rubio, Angel, Lichtenstein, Alexander I., Biermann, Silke, Stepanov, Evgeny A.
Publikováno v:
npj Quantum Mater. 9, 19 (2024)
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 material is characterized by a strong and long-ranged Coulomb interacti
Externí odkaz:
http://arxiv.org/abs/2301.07162
Autor:
Kapcia, Konrad J., Tkachenko, Victor, Capotondi, Flavio, Lichtenstein, Alexander, Molodtsov, Serguei, Mueller, Leonard, Philippi-Kobs, Andre, Piekarz, Przemysław, Ziaja, Beata
Publikováno v:
Phys. Rev. B 107 (9), 094402 (1-9) (2023)
Magnetization dynamics triggered with ultrashort laser pulses has been attracting significant attention, with strong focus on the dynamics excited by VIS/NIR pulses. Only recently, strong magnetic response in solid materials induced by intense X-ray
Externí odkaz:
http://arxiv.org/abs/2207.06187
Autor:
Szilva, Attila, Kvashnin, Yaroslav, Stepanov, Evgeny A., Nordström, Lars, Eriksson, Olle, Lichtenstein, Alexander I., Katsnelson, Mikhail I.
In this report we review the method of explicit calculations of interatomic exchange interactions of magnetic materials. This involves exchange mechanisms normally referred to as Heisenberg exchange, Dzyaloshinskii-Moriya interaction and anisotropic
Externí odkaz:
http://arxiv.org/abs/2206.02415
Autor:
Acharya, Swagata, Weber, Cedric, Pashov, Dimitar, van Schilfgaarde, Mark, Lichtenstein, Alexander I., Katsnelson, Mikhail I.
Publikováno v:
Nature Communications 14, 5565 (2023)
Many strongly correlated transition metal insulators are colored, even though they have large fundamental band gaps and no quasi-particle excitations in the visible range. Why such insulators possess the colors they do poses a serious challenge for a
Externí odkaz:
http://arxiv.org/abs/2204.11081