Results 41 to 50 of about 352,057 (287)

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

Advanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa, Lin‐Ding Yuan, Stephen D. Wilson, James M. Rondinelli   +3 more
wiley   +1 more source

A Hamiltonian and geometric formulation of general Vlasov-Maxwell-type models

Fundamental Plasma Physics, 2023
Three geometric formulations of the Hamiltonian structure of the macroscopic Maxwell equations are given: one in terms of the double de Rham complex, one in terms of L2 duality, and one utilizing an abstract notion of duality.
William Barham, Philip J. Morrison, Eric Sonnendrücker   +2 more
doaj   +1 more source

On interconnections of infinite-dimensional port-Hamiltonian systems [PDF]

, 2004
Network modeling of complex physical systems leads to a class of nonlinear systems called port-Hamiltonian systems, which are defined with respect to a Dirac structure (a geometric structure which formalizes the power-conserving interconnection structure
Pasumarthy, Ramkrishna, Schaft, Arjan J. van der   +1 more
core   +4 more sources

Lifting of the Vlasov-Maxwell Bracket by Lie-transform Method

, 2016
The Vlasov-Maxwell equations possess a Hamiltonian structure expressed in terms of a Hamiltonian functional and a functional bracket. In the present paper, the transformation ("lift") of the Vlasov-Maxwell bracket induced by the dynamical reduction of ...
Brizard, A. J., Burby, J. W., de Guillebon, L., Morrison, P. J., Vittot, M.   +4 more
core   +3 more sources

Hamiltonian Structure and Integrability [PDF]

, 1992
Publisher Summary This chapter discusses the Hamiltonian structure and integrability. The aim is to use harmonic oscillator in a general framework so that they can be carried over to other more complicated system. The chapter introduces some basic notions that describe the connection between symmetries and conserved quantities.
openaire   +2 more sources

Stacking‐Engineered Magnonic Topology and Transport in Honeycomb Homobilayers

Advanced Functional Materials, EarlyView.
ABSTRACT Topological magnons have emerged as a promising platform for dissipationless bosonic transport. However, a straightforward and effective strategy to engineer such topological states in real materials has yet to be fully realized. Here, a general scheme for controlling magnonic topological states via stacking engineering in van der Waals ...
Xiaoran Feng, Yingxi Bai, Bo Yuan, Ying Dai, Baibiao Huang, Chengwang Niu, Xiaotian Wang   +6 more
wiley   +1 more source

The Principle of Covariance and the Hamiltonian Formulation of General Relativity

Entropy, 2021
The implications of the general covariance principle for the establishment of a Hamiltonian variational formulation of classical General Relativity are addressed.
Massimo Tessarotto, Claudio Cremaschini
doaj   +1 more source

Extending Hamiltonian Operators to Get Bi-Hamiltonian Coupled KdV Systems

, 1998
An analysis of extension of Hamiltonian operators from lower order to higher order of matrix paves a way for constructing Hamiltonian pairs which may result in hereditary operators.
Dodd, Ferapontov, Fokas, Fokas, Fordy, Fuchssteiner, Gel'fand, Ghosh, Gürses, Karasu, Ma, Ma, Ma, Ma, Ma, Magri, Maxim Pavlov, Olver, Svinolupov, Tu, Wen-Xiu Ma   +20 more
core   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source