Results 11 to 20 of about 566,007 (280)
Entropy, 2023 We demonstrate that an evanescent wave spin exists outside a finite quantum well by solving the Dirac equation in a finite cylindrical quantum well. The analytical analysis validates the wavefunction inside an infinite quantum well but recovers a non-zero evanescent wave outside the well.
Ju Gao, Fang Shen
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Spin-Wave Wave Function for Quantum Spin Models [PDF]
Progress of Theoretical Physics, 1997 We present a new approach to determine an accurate variational wave function for general quantum spin models, completely defined by a consistency requirement with the simple and well known linear spin·wave expansion. With this wave function, it is also possible to obtain the correct behavior of the long distance correlation functions for the 1D S=1/2 ...
Franjic F, Sorella, Sandro
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Spin Waves in Quasiequilibrium Spin Systems [PDF]
Physical Review Letters, 2006 Using the Landau Fermi liquid theory we have discovered a new regime for the propagation of spin waves in a quasi-equilibrium spin systems. We have determined the dispersion relation for the transverse spin waves and found that one of the modes is gapless.
Bedell, Kevin S., Dahal, Hari P.
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Magnetoelectric spin wave amplifier for spin wave logic circuits [PDF]
Journal of Applied Physics, 2009 We propose and analyze a spin wave amplifier aimed to enhance the amplitude of the propagating spin wave via the magnetoelectric effect. The amplifier is a two-layer multiferroic structure, which comprises piezoelectric and ferromagnetic materials. By applying electric field to the piezoelectric layer, the stress is produced.
Khitun, Alexander +2 more
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Spin waves in random spin chains [PDF]
Journal of Applied Physics, 2003 We study quantum spin-1/2 Heisenberg ferromagnetic chains with dilute random antiferromagnetic impurity bonds with the modified spin-wave theory. By describing thermal excitations in the language of spin waves, we observe a low-temperature Curie susceptibility due to the formation of large spin clusters first predicted by the real-space renormalization-
Wan, Xin +3 more
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Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
Scientific Reports, 2021 We performed finite-element micromagnetic simulations to examine the formation of skyrmions without intrinsic Dzyaloshinskii–Moriya interaction (DMI) in magnetic hemispherical shells. We found that curvature-induced DM-like interaction allows for further
Jaehak Yang +3 more
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Optical-acoustic excitation of broadband terahertz antiferromagnetic spin waves
New Journal of Physics, 2022 We propose an optical-acoustic means to excite broadband terahertz antiferromagnetic (AFM) spin wave in a metal/insulator/antiferromagnet heterostructure.
Jinglin Zhang +13 more
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Feasibility Study of Logic Circuits with Spin Wave Bus [PDF]
, 2007 We present a feasibility study of logic circuits utilizing spin waves for information transmission and processing. As an alternative approach to the transistor-based architecture, logic circuits with spin wave bus do not use charge as an information ...
Bao, Mingqiang +4 more
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Nuclear Physics B - Proceedings Supplements, 1987 Abstract A high resolution study is made of spin-wave dynamics above the Suhl threshold in a sphere of yttrium iron garnet driven by microwave ferromagnetic resonance. In different regions of parameter space observed behavior includes: excitation of a single spatial spin-wave mode at threshold; when two modes are excited, low frequency collective ...
Bryant, P., Jeffries, C., Nakamura, K.
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Time Refraction of Spin Waves [PDF]
Physical Review Letters, 2021 We present an experimental study of time refraction of spin waves propagating in microscopic waveguides under the influence of time-varying magnetic fields. Using space- and time-resolved Brillouin light scattering microscopy, we demonstrate that the broken translational symmetry along the time coordinate can be used to in- or decrease the energy of ...
K. Schultheiss +11 more
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