Quasiparticles & collective excitations as a research area investigates emergent, effective degrees of freedom in many-body systems, where interactions among underlying microscopic constituents give rise to particle-like or mode-like entities such as phonons, magnons, polarons, excitons, and plasmons. This field focuses on formulating and analyzing low-energy effective theories, dispersion relations, lifetimes, and interaction vertices of these excitations using frameworks such as many-body perturbation theory, Green’s functions, field-theoretic methods, and numerical many-body techniques. It plays a central role in understanding transport, superconductivity, topological phases, and nonequilibrium dynamics in condensed matter, ultracold atomic systems, and related quantum materials.
A new study led by Dai Qing's team from the National Center for Nanoscience and Technology (NCNST) of the Chinese Academy of Sciences (CAS) and Javier Abajo from the Institute of Photonic Sciences (ICFO) in Spain has shown ...
Nanophysics
Feb 14, 2023
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Skyrmions and bimerons are fundamental topological spin textures in magnetic thin films with asymmetric exchange interactions, and they can be used as information carrier for next generation low energy consumption memory, ...
Nanophysics
Nov 11, 2022
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From The City College of New York's Center for Discovery and Innovation and the Physics Department comes news of a new type of magnetic quasiparticle created by coupling light to a stack of ultrathin two-dimensional magnets. ...
Nanophysics
Sep 19, 2022
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Magnetic skyrmions are extremely small and stable swirls of magnetization, often referred to as "topological quasi-particles" since an emerging stability embraces this spin ensemble. As such, skyrmions can be manipulated ...
Nanophysics
Sep 7, 2022
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A pair of researchers, one with Peking University, the other with Princeton University, has found that the parameters of twisted-graphene's excitation spectra correspond directly to attributes of the heavy fermion model. ...
The emerging field of valleytronics, which exploits the momentum preference of excited electrons, or excitons, in a variety of optoelectronic devices, is closely tied to the fabrication of novel 2D materials just atoms thick. ...
Nanomaterials
Jun 28, 2022
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151
Researchers from Nanjing University and Beihang University in China and the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg, Germany, have produced a new class of exciton with hybrid dimensionality ...
Nanophysics
Jun 20, 2022
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Atomically thin semiconductors such as molybdenum disulfide and tungsten disulfide are promising materials for nanoscale photonic devices. These approximately 2D semiconductors support so-called excitons, which are bound ...
Nanophysics
Jun 14, 2022
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108
The manuscript "Electric tuning and switching of the resonant response of nanoparticle arrays with liquid crystals" by Erik van Heijst and co-workers (PSN) has been selected as featured article and journal cover in the last ...
Nanophysics
Mar 2, 2022
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In recent years, a phenomenon called the quantum Hall effect has emerged as a platform for hosting exotic features called quasiparticles, with properties that could lead to exciting applications in areas like quantum computing. ...
Nanophysics
Jan 21, 2022
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