AI Article Synopsis
- The proposed mechanism generates chiral phononlike excitations through magnetoelastic couplings without needing magnetic fields or out-of-plane magnetization.
- By analyzing a triangular lattice ferromagnet, the research reveals how lattice symmetry influences chirality, linking it to topological phonon classes.
- The study suggests potential applications in spintronics and phononics, emphasizing the experimental viability of measuring phonon magnetization and thermal Hall conductivity in anisotropic magnets.
Article Abstract
We propose a mechanism to obtain chiral phononlike excitations from the bond-dependent magnetoelastic couplings in the absence of out-of-plane magnetization and magnetic fields. By mapping the hybrid excitation to its phononic analog, we reveal the impact of the lattice symmetry on the origin of the chirality. In the example of a triangular lattice ferromagnet, we recognize that the system is equivalent to the class D of topological phonons, and show the tunable chirality and topology by an in-plane magnetic field. As a possible experimental probe, we evaluate the phonon magnetization and planar thermal Hall conductivity. Our study gives a new perspective on tunable topological and chiral excitations beyond the Raman spin-lattice coupling, suggesting possible applications of spintronics and phononics in various anisotropic magnets and/or Kitaev materials.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.133.246604 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Chiral Phonons Induced from Spin Dynamics via Magnetoelastic Anisotropy.
Phys Rev Lett
December 2024
International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.
Article Synopsis
- The proposed mechanism generates chiral phononlike excitations through magnetoelastic couplings without needing magnetic fields or out-of-plane magnetization.
- By analyzing a triangular lattice ferromagnet, the research reveals how lattice symmetry influences chirality, linking it to topological phonon classes.
- The study suggests potential applications in spintronics and phononics, emphasizing the experimental viability of measuring phonon magnetization and thermal Hall conductivity in anisotropic magnets.
A semiclassical non-adiabatic phase-space approach to molecular translations and rotations: Surface hopping with electronic inertial effects.
J Chem Phys
December 2024
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
We demonstrate that working with a correct phase-space electronic Hamiltonian captures electronic inertial effects. In particular, we show that phase space surface hopping dynamics do not suffer (at least to very high order) from non-physical non-adiabatic transitions between electronic eigenstates during the course of pure nuclear translational and rotational motion. This work opens up many new avenues for quantitatively investigating complex phenomena, including angular momentum transfer between chiral phonons and electrons as well as chiral-induced spin selectivity effects.
View Article and Find Full Text PDFSpintronic devices and applications using noncollinear chiral antiferromagnets.
Nanoscale Horiz
December 2024
Electrical and Computer Engineering, The Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, USA.
Antiferromagnetic materials have several unique properties, such as a vanishingly small net magnetization, which generates weak dipolar fields and makes them robust against perturbation from external magnetic fields and rapid magnetization dynamics, as dictated by the geometric mean of their exchange and anisotropy energies. However, experimental and theoretical techniques to detect and manipulate the antiferromagnetic order in a fully electrical manner must be developed to enable advanced spintronic devices with antiferromagnets as their active spin-dependent elements. Among the various antiferromagnetic materials, conducting antiferromagnets offer high electrical and thermal conductivities and strong electron-spin-phonon interactions.
View Article and Find Full Text PDFMechanisms of interlayer friction in low-dimensional homogeneous thin-wall shell structures and its strain effect.
Phys Chem Chem Phys
December 2024
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510640, People's Republic of China.
Due to the multi-factor coupling effect, the rule of interlayer friction in low-dimensional homogeneous thin-wall shell structures is still unclear. Double walled carbon nanotubes (DWCNTs) having a typical low-dimensional homogeneous thin-wall shell structure are selected for this study. The interlayer friction of numerous chiral DWCNTs is investigated using molecular dynamics simulations to systematically analyze and understand the coupling mechanisms of various factors in interlayer friction.
View Article and Find Full Text PDFChiral Phonon, Valley Polarization, and Inter/Intravalley Scattering in a van der Waals ReSe Semiconductor.
ACS Nano
December 2024
Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
Article Synopsis
- Exploring the role of valley manipulatable layered semiconductors, particularly in valleytronic devices, is the focus of this research on van der Waals (vdW) ReSe, highlighting its phonon chirality and scattering behavior.
- The study employs various spectroscopic techniques to reveal critical features like the direction of Re chains, chiral phonon existence, and the influence of layer thickness and temperature on valley polarization strength.
- The findings indicate potential advancements in valley physics and the development of valley(opto)tronic nanodevices using low-symmetry vdW ReSe due to its strong phonon-photon coupling and exciton-like effects.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!