scholarly journals Unconventional magnon excitation by off-resonant microwaves

2021 ◽  
Vol 103 (13) ◽  
Author(s):  
H. Y. Yuan ◽  
Shasha Zheng ◽  
Q. Y. He ◽  
Jiang Xiao ◽  
Rembert A. Duine
Keyword(s):  
Magnon Excitation

Far infrared study of a soft-mode phonon and two-magnon excitation in MEM(TCNQ)2

1991 ◽  
Vol 42 (3) ◽  
pp. 2503-2506 ◽  
Author(s):  
Y. Tanaka ◽  
N. Satoh ◽  
K. Nagasaka
Keyword(s):  
Soft Mode ◽  
Far Infrared ◽  
Infrared Study ◽  
Magnon Excitation

Light-induced coherent magnon excitation in monolayer magnetic nanodots

2015 ◽  
Vol 29 (08) ◽  
pp. 1550055
Author(s):  
Peng Feng ◽  
Jianqiao Xie
Keyword(s):  
Theoretical Model ◽  
Magnetic Dipole ◽  
Polarized Light ◽  
Dipole Interaction ◽  
Continuum Approximation ◽  
Magnetic Dipole Interaction ◽  
Circularly Polarized Light ◽  
Component Distribution ◽  
Magnetic Nanodots ◽  
Magnon Excitation

We develop a quantum theory to deal with the coherent magnon excitation in monolayer magnetic nanodots induced by a circularly polarized light. In our theoretical model, the exchange interaction, the magnetic dipole interaction and the light-matter interaction are all taken into account and an effective dynamic equations governing the magnon excitation is derived by a continuum approximation. Our theoretical model shows that the helicity of light and the magnetic dipole interaction govern the magnon excitation and result in the occurrence of various patterns for the spin z-component distribution. We present a scheme to manipulate the single-mode magnon excitation by properly tuning the light frequency.

Magnon excitation of quasi-one-dimensional organic ferromagnet

1995 ◽  
Vol 4 (7) ◽  
pp. 505-509
Author(s):  
Wang Yu-qing ◽  
Xiong Yuan-sheng ◽  
Yi Lin ◽  
Yao Kai-lun
Keyword(s):  
One Dimensional ◽  
Magnon Excitation

scholarly journals Spectral weight of resonant inelastic X-ray scattering in doped cuprates: Effect of core-hole lifetime

2018 ◽  
Vol 32 (17) ◽  
pp. 1840017 ◽  
Author(s):  
Takami Tohyama ◽  
Kenji Tsutsui
Keyword(s):  
Spectral Weight ◽  
Main Peak ◽  
Core Hole ◽  
X Ray ◽  
The Core ◽  
X Ray Scattering ◽  
Spin Flip ◽  
X Ray Absorption ◽  
Magnon Excitation ◽  
Ray Scattering

We examine the effect of core-hole lifetime on the spectral weight of resonant inelastic X-ray scattering (RIXS) in hole-doped cuprates. We calculate the spectral weight by using the exact diagonalization technique for a 4 × 4 doped Hubbard lattice and find that the spin-flip channel detecting single-magnon excitation is less sensitive to the core-hole lifetime while in the non-spin-flip channel the spectral weight is strongly dependent on the lifetime. In the latter, charge and two-magnon excitations predominately contribute to RIXS for short and long core-hole lifetimes, respectively. For a realistic value of the core-hole lifetime in cuprates, both the charge and two-magnon excitations are expected to contribute to the non-spin-flip channel in RIXS when the incident-photon energy is tuned to the main peak of X-ray absorption spectrum.

scholarly journals Dirac Magnons and Topological Energy Gaps in Honeycomb Magnets

2020 ◽  
Vol 29 (6) ◽  
pp. 8-13
Author(s):  
Jae-Ho CHUNG
Keyword(s):  
Electronic Materials ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Linear Dispersion ◽  
Dirac Particles ◽  
Energy Gaps ◽  
Theoretical Predictions ◽  
Momentum Spectra ◽  
Van Der Waals Materials ◽  
Magnon Excitation

Fermionic Dirac particles have long been known to exist in electronic materials exhibiting linear dispersion relations within energy-momentum spectra, such as two-dimensional graphene. Recently, a bosonic version of Dirac particles was predicted to appear in the magnon excitation structures of honeycomb magnets. In this article, we review theoretical predictions of topological Dirac magnons in honeycomb ferromagnets, and their experimental observations using inelastic neutron scattering in Cr-based van der Waals materials.

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