Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Pavarini, Eva"'
Publikováno v:
Phys. Rev. B 106, 115110 ( 2022)
We show that the $t_{2g}^2$ perovskite LaVO$_3$, in its orthorhombic phase, is a rare case of a system hosting an orbital-ordering Kugel-Khomskii phase transition, rather than being controlled by the Coulomb-enhanced crystal-field splitting. We find
Externí odkaz:
http://arxiv.org/abs/2209.04912
Autor:
Zwartsenberg, Berend, Day, Ryan P., Razzoli, Elia, Michiardi, Matteo, Na, Mengxing, Zhang, Guoren, Denlinger, Jonathan D., Vobornik, Ivana, Bigi, Chiara, Kim, Bumjoon, Elfimov, Ilya S., Pavarini, Eva, Damascelli, Andrea
Publikováno v:
Phys. Rev. B 105, 245130 (2022)
Sr$_{2}$IrO$_{4}$ has often been described via a simple, one-band pseudo-spin 1/2 model, subject to electron-electron interactions, on a square lattice, fostering analogies with cuprate superconductors, believed to be well described by a similar mode
Externí odkaz:
http://arxiv.org/abs/2205.12483
Publikováno v:
Physical Review B 99, 235145 (2019)
Impressive advances in the field of molecular spintronics allow one to study electron transport through individual magnetic molecules embedded between metallic leads in the purely quantum regime of single electron tunneling. Besides fundamental inter
Externí odkaz:
http://arxiv.org/abs/1909.01770
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 116, 106402 (2016)
The topology of the Fermi surface of Sr2RuO4 is well described by local-density approximation calculations with spin-orbit interaction, but the relative size of its different sheets is not. By accounting for many-body effects via dynamical mean-field
Externí odkaz:
http://arxiv.org/abs/1612.03060
Publikováno v:
Phys. Rev. B 96, 054107 (2017)
Ginzburg-Landau theory describes phase transitions as the competition between energy and entropy: The ordered phase has lower energy, while the disordered phase has larger entropy. When heating the system, ordering is reduced entropically until it va
Externí odkaz:
http://arxiv.org/abs/1611.05408
Autor:
Pavarini, Eva
The LDA+DMFT method is a very powerful tool for gaining insight into the physics of strongly correlated materials. It combines traditional ab-initio density-functional techniques with the dynamical mean-field theory. The core aspects of the method ar
Externí odkaz:
http://arxiv.org/abs/1411.6906
Publikováno v:
Phys. Rev. B 89, 155109 (2004)
We study the origin of the cubic to tetragonal and tetragonal to monoclinic structural transitions in KCrF3, and the associated change in orbital order, paying particular attention to the relevance of super-exchange in both phases. We show that super
Externí odkaz:
http://arxiv.org/abs/1312.5532
Publikováno v:
Phys. Rev. B 87, 195141 (2013)
Orbital and spin ordering phenomena in strongly correlated systems are commonly studied using the local-density approximation + dynamical mean-field theory approach. Typically, however, such simulations are restricted to simplified models (density-de
Externí odkaz:
http://arxiv.org/abs/1302.5068
Publikováno v:
Phys. Rev. B 86, 184413 (2012)
Spin-state transitions are the hallmark of rare-earth cobaltates. In order to understand them, it is essential to identify all relevant parameters which shift the energy balance between spin states, and determine their trends. We find that \Delta, th
Externí odkaz:
http://arxiv.org/abs/1208.0425