Terahertz control of many-body dynamics in quantum materials

CJ Yang, J Li, M Fiebig, S Pal - Nature Reviews Materials, 2023‏ - nature.com
Quantum-mechanical phenomena underpin the behaviour of quantum materials at the
microscopic level. The description of several essential properties of these materials …

Colloquium: Spontaneous magnon decays

ME Zhitomirsky, AL Chernyshev - Reviews of Modern Physics, 2013‏ - APS
A theoretical overview of the phenomenon of spontaneous magnon decays in quantum
antiferromagnets is presented. The intrinsic zero-temperature dam** of magnons in …

Spin waves in a triangular lattice antiferromagnet: Decays, spectrum renormalization, and singularities

AL Chernyshev, ME Zhitomirsky - Physical Review B—Condensed Matter and …, 2009‏ - APS
We present a comprehensive study of the dynamical properties of the quantum Heisenberg
antiferromagnet on a triangular lattice within the framework of spin-wave theory. The distinct …

Origin of terahertz soft-mode nonlinearities in ferroelectric perovskites

S Pal, N Strkalj, CJ Yang, MC Weber, M Trassin… - Physical Review X, 2021‏ - APS
Soft modes are intimately linked to structural instabilities and are key for the understanding
of phase transitions. The soft modes in ferroelectrics, for example, map directly the polar …

Dynamical structure factor of the triangular-lattice antiferromagnet

M Mourigal, WT Fuhrman, AL Chernyshev… - Physical Review B …, 2013‏ - APS
We elucidate the role of magnon interaction and spontaneous decays in the spin dynamics
of the triangular-lattice Heisenberg antiferromagnet by calculating its dynamical structure …

Thermal Hall effect incorporating magnon dam** in localized spin systems

S Koyama, J Nasu - Physical Review B, 2024‏ - APS
We propose a theory for thermal Hall transport mediated by magnons to address the impact
of their dam** resulting from magnon-magnon interactions in insulating magnets. This …

Magnetic structure of films: Dependence on anisotropy and atomic morphology

PJ Jensen, KH Bennemann - Surface science reports, 2006‏ - Elsevier
In this review a number of magnetic properties of different thin film systems are investigated
as functions of the temperature and the atomic morphology. Special attention is paid to …

Two-dimensional Heisenberg antiferromagnets: Synthesis, structure, and magnetic properties

FM Woodward, AS Albrecht, CM Wynn, CP Landee… - Physical Review B, 2002‏ - APS
The magnetic susceptibility and magnetization of two layered S= 1 2 Heisenberg
antiferromagnets with moderate exchange are reported. The two isostructural …

First catch your hare*: the design and synthesis of frustrated magnets

A Harrison - Journal of Physics: Condensed Matter, 2004‏ - iopscience.iop.org
A major constraint on experimental studies of geometrically frustrated magnets (GFMs) is the
availability of suitable samples that provide tangible models to inspire or test theory. Most …

Flavor-wave theory with quasiparticle dam** at finite temperatures: Application to chiral edge modes in the Kitaev model

S Koyama, J Nasu - Physical Review B, 2023‏ - APS
We propose a theoretical framework to investigate elementary excitations at finite
temperatures within a localized electron model that describes the interactions between …