Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Grandi, Francesco"'
Exotic quantum order in kagome metals, i.e., quantum materials with a Fermi liquid parent state of electrons on a kagome lattice, has appeared as a vibrant emerging field of condensed matter physics. Already in a small kagome material subclass such a
Externí odkaz:
http://arxiv.org/abs/2408.06953
Starting from a low-energy model for the band dispersion of the $2 \times 2$ charge-ordered phase of the kagome metals $A$V$_3$Sb$_5$ ($A=$ K, Rb, Cs), we show that nematicity can develop in this state driven either by $4 \times 4$ charge fluctuation
Externí odkaz:
http://arxiv.org/abs/2406.09910
Autor:
Profe, Jonas B., Klebl, Lennart, Grandi, Francesco, Hohmann, Hendrik, Dürrnagel, Matteo, Schwemmer, Tilman, Thomale, Ronny, Kennes, Dante M.
The recent discovery of a variety of intricate electronic order in kagome metals has sprouted significant theoretical and experimental interest. From an electronic perspective on the potential microscopic origin of these phases, the most basic model
Externí odkaz:
http://arxiv.org/abs/2402.11916
Publikováno v:
Physical Review B 107, 155131 (2023)
Kagome metals $A$V$_3$Sb$_5$ ($A=$K, Rb, Cs) exhibit an exotic charge order (CO), involving three order parameters, with broken translation and time-reversal symmetries compatible with the presence of orbital currents. The properties of this phase ar
Externí odkaz:
http://arxiv.org/abs/2302.01615
Publikováno v:
Phys. Rev. B 108, 035115 (2023)
We discuss a semiclassical approach to solve the quantum impurity model within non-equilibrium dynamical mean-field theory for electron-lattice models. The effect of electronic fluctuations on the phonon is kept beyond Ehrenfest dynamics, leading to
Externí odkaz:
http://arxiv.org/abs/2209.00428
Publikováno v:
Physical Review B 107, 245112 (2023)
Using ultrashort laser pulses, it has become possible to probe the dynamics of long-range order in solids on microscopic timescales. In the conventional description of symmetry-broken phases within time-dependent Ginzburg-Landau theory, the order par
Externí odkaz:
http://arxiv.org/abs/2112.15323
Quasi-one-dimensional systems exhibit many-body effects elusive in higher dimensions. A prime example is spin-orbital separation, which has been measured by resonant inelastic X-ray scattering (RIXS) in Sr$_2$CuO$_3$. Here, we theoretically analyze t
Externí odkaz:
http://arxiv.org/abs/2111.12514
Autor:
Grandi, Francesco, Eckstein, Martin
Light-manipulation of correlated electronic phases in solids offers the tantalizing prospect of realizing electronic devices operating at the ultrafast time-scale. In this context, the experimental realization of non-equilibrium transitions from a me
Externí odkaz:
http://arxiv.org/abs/2104.03644
Autor:
Grandi, Francesco, Eckstein, Martin
Publikováno v:
Phys. Rev. B 103, 245117 (2021)
Orbitally ordered states exhibit unique features which make them a promising platform for exploring the ultrafast dynamics of long-range order in solids: Their free energy typically has multiple discrete minima, and electric laser fields or selective
Externí odkaz:
http://arxiv.org/abs/2103.10876
Publikováno v:
Phys. Rev. B 103, 041110 (2021)
Nonlinear phononics holds the promise for controlling properties of quantum materials on the ultrashort timescale. Using nonequilibrium dynamical mean-field theory, we solve a model for the description of organic solids, where correlated electrons co
Externí odkaz:
http://arxiv.org/abs/2005.14100