98 citations · 247 across the 17 of their papers we have counts for
17 papers
Momentum-Selective Electron and Spin Dynamics under Ultrafast Photoexcitation
Gusein Bedirkhanov, Nagamalleswararao Dasari, Alexander I. Lichtenstein +1
Recent advances in time-resolved spectroscopies have enabled direct access to the momentum-selective nonequilibrium dynamics of correlated quantum materials, revealing a strongly m…
Nonlocal Correlation Effects in dc and Optical Conductivity of the Hubbard Model
Nagamalleswararao Dasari, Hugo U. R. Strand, Martin Eckstein +2
Conductivity is one of the most direct probes of electronic systems, yet its theoretical description remains challenging in the presence of strong non-local correlations. In this L…
Electron-magnon dynamics triggered by an ultrashort laser pulse: A real-time Dual study
Nagamalleswararao Dasari, Hugo U. R. Strand, Martin Eckstein +2
Ultrafast irradiation of correlated electronic systems triggers complex dynamics involving quasi-particle excitations, doublons, charge carriers, and spin fluctuations. To describe…
Memory truncated Kadanoff-Baym equations
Christopher Stahl, Nagamalleswararao Dasari, Jiajun Li +3
The Keldysh formalism for nonequilibrium Green's functions is a powerful theoretical framework for the description of the electronic structure, spectroscopy, and dynamics of strong…
Ultrafast dynamics in relativistic Mott insulators
Jiajun Li, Nagamalleswararao Dasari, Martin Eckstein
We study the photoinduced ultrafast dynamics in relativistic Mott insulators, i.e., Mott insulators with strong spin-orbit coupling. For this purpose, we consider a minimal one-ban…
A photo-induced strange metal with electron and hole quasi-particles
Nagamalleswararao Dasari, Jiajun Li, Philipp Werner +1
Photo-doping of Mott insulators or correlated metals can create an unusual metallic state which simultaneously hosts hole-like and electron-like particles. We study the dynamics of…
Interplay of strong correlations and covalency in ionic band insulators
Nagamalleswararao Dasari, Sujan K. K., Juana Moreno +1
We address the role of electronic correlations in different kinds of band insulators by using the two-orbital Hubbard model within the dynamical mean-field theory (DMFT). An intrig…
Revealing Hund's multiplets in Mott insulators under strong electric fields
Nagamalleswararao Dasari, Jiajun Li, Philipp Werner +1
We investigate the strong-field dynamics of a paramagnetic two-band Mott insulator using real-time dynamical mean-field theory. A dielectric breakdown occurs due to many-body Landa…
Ultra-fast electric field controlled spin-fluctuations in the Hubbard model
Nagamalleswararao Dasari, Martin Eckstein
Highly intense electric field pulses can move the electronic momentum occupation in correlated metals over large portions of the Brillouin zone, leading to phenomena such as dynami…
Transient Floquet engineering of superconductivity
Nagamalleswararao Dasari, Martin Eckstein
Intense time-periodic laser fields can transform the electronic structure of a solid into strongly modified Floquet-Bloch bands. While this suggests multiple pathways to induce ele…
Emergent Strange Nodal Metallicity from Orbital-Selective Mott Physics
Swagata Acharya, Mukul S. Laad, Nagamalleswararao Dasari +3
While a specific kind of strange metal is increasingly found to be the "normal" states in a wide variety of unconventional superconductors, its microscopic origin is presently a ho…
Photo-excited states in correlated band insulators
Nagamalleswararao Dasari, Martin Eckstein
We study the photo-excitation dynamics of correlated band insulators, using non-equilibrium dynamical mean-field theory for the ionic Hubbard model. We find two distinct behaviors,…
Quantum critical local spin dynamics near the Mott metal-insulator transition in infinite dimensions
Nagamalleswararao Dasari, N. S. Vidhyadhiraja, Mark Jarrell +1
Finding microscopic models for metallic states that exhibit quantum critical properties such as scaling is a major theoretical challenge. We calculate the local dynamical spi…
A first principles investigation of cubic BaRuO: A Hund's metal
Nagamalleswararao Dasari, S. R. K. C. Sharma Yamijala, Manish Jain +4
A first-principles investigation of cubic-BaRuO, by combining density functional theory with dynamical mean-field theory and a hybridization expansion continuous time quantum M…
Weak ferromagnetism and magnetization reversal in YFeCrO
Nagamalleswararao Dasari, P. Mandal, A. Sundaresan +1
We present combined experimental and theoretical studies on the magnetic properties of a solid solution between yttrium orthoferrite and yttrium orthochromite systems, YFeC…
Quantum critical dynamics of a magnetic impurity in a semiconducting host
Nagamalleswararao Dasari, Swagata Acharya, A. Taraphder +3
We have investigated the finite temperature dynamics of the singlet to doublet continuous quantum phase transition in the gapped Anderson impurity model using hybridization expansi…
A multi-orbital iterated perturbation theory for model Hamiltonians and real material-specific calculations of correlated systems
Nagamalleswararao Dasari, Wasim Raja Mondal, Peng Zhang +3
Perturbative schemes utilizing a spectral moment expansion are well known and extensively used for investigating the physics of model Hamiltonians and real material systems. The ad…