711 citations · 5.5k across the 188 of their papers we have counts for
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Resonant spin mode from retarded relaxation
J. Beater, G. S. Uhrig
In ultrafast spin dynamics additional modes in the THz range appear which cannot be captured by conventional Landau-Lifshitz equations. Extending these equations by further time de…
Control of the Néel vector in the quantum antiferromagnetic honeycomb lattice
Asliddin Khudoyberdiev, Dag-Björn Hering, Vanessa Sulaiman +1
The switching of antiferromagnetic order and its efficient control promise to enable ultrafast manipulation of data and large storage capacity. Recently, the time-dependent Schwing…
Dynamical mean-field theory for dense spin systems at finite temperature
Przemysław Bieniek, Timo Gräßer, Götz S. Uhrig
In recent years, a method for computing spin dynamics at infinite temperature (spinDMFT) was developed. It utilizes the ideas of dynamical mean-field theory for fermions: single-si…
Switching magnetization of quantum antiferromagnets: Schwinger boson mean-field theory compared to exact diagonalization
Florian Johannesmann, Asliddin Khudoyberdiev, Götz S. Uhrig
Antiferromagnets have attracted significant attention because of their considerable potential in engineering high-density and ultrafast memory devices, a crucial and increasingly d…
Quantum decay of magnons in the unfrustrated honeycomb Heisenberg model
Calvin Krämer, Dag-Björn Hering, Vanessa Sulaiman +3
We investigate the physical properties of elementary magnon excitations of the ordered antiferromagnetic Heisenberg model on the honeycomb lattice using quantum Monte Carlo (QMC) s…
Quantum effects in the magnon spectrum of 2D altermagnets via continuous similarity transformations
Raymond Wiedmann, Dag-Björn Hering, Vanessa Sulaiman +3
We investigate quantum effects on magnon excitations in a minimal spin-1/2 Heisenberg model for 2D altermagnets on the square lattice. A continuous similarity transformation is app…
High-Temperature Quantum Anomalous Hall Effect in Buckled Honeycomb Antiferromagnets
Mohsen Hafez-Torbati, Götz S. Uhrig
We propose Néel antiferromagnetic (AF) Mott insulators with a buckled honeycomb structure as potential candidates to host a high-temperature AF Chern insulator (AFCI). Using a gene…
Pulsed Magnetophononics in Gapped Quantum Magnets
B. Demazure, M. Krebs, G. S. Uhrig +1
One route to the control of quantum magnetism at ultrafast timescales is magnetophononics, the modulation of magnetic interactions by coherently driven lattice excitations. Theoret…
Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCuPO
Patrick Pilch, Kirill Amelin, Gary Schmiedinghoff +13
We report on terahertz spectroscopic measurements of quantum spin dynamics on single crystals of a spin-1/2 frustrated spin-ladder antiferromagnet BiCuPO as a function of t…
Exchange enhanced switching by alternating fields in quantum antiferromagnets
Asliddin Khudoyberdiev, Götz S. Uhrig
Information can be stored magnetically in antiferromagnets ultrafast since their characteristic times are on the picosecond scale. Various spin torques have proven to be important…
Landau-Lifshitz damping from Lindbladian dissipation in quantum magnets
Götz S. Uhrig
As of now, the phenomenological classical Landau-Lifshitz (LL) damping of magnetic order is not conceptually linked to the quantum theory of dissipation of the Lindbladian formalis…
Quantum melting of long-range ordered quantum antiferromagnets investigated by momentum-space continuous similarity transformations
Dag-Björn Hering, Matthias R. Walther, Kai P. Schmidt +1
We apply continuous similarity transformations (CSTs) to study the zero-temperature breakdown of long-range ordered quantum antiferromagnets. The CST flow equations are truncated i…
Quantitative description of long-range order in the anisotropic spin-1/2 Heisenberg antiferromagnet on the square lattice
Nils Caci, Dag-Björn Hering, Matthias R. Walther +3
The quantitative description of long-range order remains a challenge in quantum many-body physics. We provide zero-temperature results from two complementary methods for the ground…
Collective excitations in competing phases in two and three dimensions
Joshua Althüser, Götz S. Uhrig
We investigate the superconducting (SC), charge-density wave (CDW), and antiferromagnetic (AFM) phases in the extended Hubbard model at zero temperature and half-filling. We employ…
Antiferromagnetic Chern insulator with large charge gap in heavy transition-metal compounds
Mohsen Hafez-Torbati, Götz S. Uhrig
Despite the discovery of multiple intrinsic magnetic topological insulators in recent years the observation of Chern insulators is still restricted to very low temperatures due to…
Switching of Magnetization in Quantum Antiferromagnets with Time-Dependent Control Fields
Asliddin Khudoyberdiev, Götz S. Uhrig
Ultrafast manipulation of magnetic states is one of the necessities in modern data storage technology. Quantum antiferromagnets are promising candidates in this respect. The orient…
Switching the Magnetization in Quantum Antiferromagnets
Katrin Bolsmann, Asliddin Khudoyberdiev, Götz S. Uhrig
The orientation of the order parameter of quantum magnets can be used to store information in a dense and efficient way. Switching this order parameter corresponds to writing data.…
Strong-coupling magnetophononics: Self-blocking, phonon-bitriplons, and spin-band engineering
M. Yarmohammadi, M. Krebs, G. S. Uhrig +1
Magnetophononics, the modulation of magnetic interactions by driving infrared-active lattice excitations, is emerging as a key mechanism for the ultrafast dynamical control of both…
Interacting triplons in frustrated spin ladders: Binding and decay in BiCuPO
Leanna B. Müller, Götz S. Uhrig
Establishing a comprehensive model of the rich spin dynamics in BiCuPO has been a challenge over the last decade. Inelastic neutron scattering experiments revealed that its…
Continuous similarity transformation for critical phenomena: easy-axis antiferromagnetic XXZ model
Matthias R. Walther, Dag-Björn Hering, Götz S. Uhrig +1
We apply continuous similarity transformations (CSTs) to the easy-axis antiferromagnetic XXZ-model on the square lattice. The CST flow equations are truncated in momentum space by…
Antiferromagnetic Chern insulator in centrosymmetric systems
Morad Ebrahimkhas, Götz S. Uhrig, Walter Hofstetter +1
An antiferromagnetic Chern insulator (AFCI) can exist if the effect of the time-reversal transformation on the electronic state cannot be compensated by a space group operation. Th…
Simplified approach to the magnetic blue shift of Mott gaps
Mohsen Hafez-Torbati, Frithjof B. Anders, Götz S. Uhrig
The antiferromagnetic ordering in Mott insulators upon lowering the temperature is accompanied by a transfer of the single-particle spectral weight to lower energies and a shift of…
Lattice-driven femtosecond magnon dynamics in -MnTe
Kira Deltenre, Davide Bossini, Frithjof B. Anders +1
The light-induced femtosecond dynamics of the sublattice magnetizations in the antiferromagnetically ordered phase of the semiconductor -MnTe is investigated theoretically as fu…
Charge dynamics in magnetically disordered Mott insulators
Philip Bleicker, Dag-Björn Hering, Götz S. Uhrig
With the aid of both a semi-analytical and a numerically exact method we investigate the charge dynamics in the vicinity of half-filling in the one- and two-dimensional - mod…