نتایج جستجو برای: relaxation material

تعداد نتایج: 438439  

2013
H. Ochoa F. Guinea V. I. Fal’ko

We propose a theory of spin relaxation of electrons and holes in two-dimensional hexagonal crystals such as atomic layers of transition-metal dichalcogenides (MoS2, WSe2, etc.). We show that, even in intrinsically defect-free crystals, their flexural deformations are able to generate spin relaxation of carriers. Based on symmetry analysis, we formulate a generic model for spin-lattice coupling ...

Journal: :Physical review letters 2003
Dmitriy S Ivanov Leonid V Zhigilei

The kinetics and microscopic mechanisms of laser melting of a thin metal film are investigated in a computational study that combines molecular dynamics simulations with a continuum description of the laser excitation and subsequent relaxation of the conduction band electrons. Two competing melting mechanisms, homogeneous nucleation of liquid regions inside the crystalline material and propagat...

Journal: :Physical review letters 2013
P Subedi S Vélez F Macià S Li M P Sarachik J Tejada S Mukherjee G Christou A D Kent

The energy released in a magnetic material by reversing spins as they relax toward equilibrium can lead to a dynamical instability that ignites self-sustained rapid relaxation along a deflagration front that propagates at a constant subsonic speed. Using a trigger heat pulse and transverse and longitudinal magnetic fields, we investigate and control the crossover between thermally driven magnet...

2008
MD Yang CH Hu JL Shen SM Lan PJ Huang GC Chi KH Chen LC Chen TY Lin

The energy relaxation of electrons in γ-In2Se3nanorods was investigated by the excitation-dependent photoluminescence (PL). From the high-energy tail of PL, we determine the electron temperature (Te) of the hot electrons. TheTevariation can be explained by a model in which the longitudinal optical (LO)-phonon emission is the dominant energy relaxation process. The high-quality γ-In2Se3nanorods ...

Journal: :Journal of biomechanical engineering 2013
Bin Xu Haiyue Li Yanhang Zhang

The macroscopic viscoelastic behavior of collagen gel was studied through relaxation time distribution spectrum obtained from stress relaxation tests and viscoelastic constitutive modeling. Biaxial stress relaxation tests were performed to characterize the viscoelastic behavior of collagen gel crosslinked with Genipin solution. Relaxation time distribution spectrum was obtained from the stress ...

Journal: :Solid State Ionics 2022

Oxygen and proton transport properties of La5.4WO11.1-δ are investigated using electrical conductivity relaxation. Chemical diffusion coefficients surface exchange both hydrogen oxygen presumed to govern relaxation extracted from fitting the two-fold observed after hydration/dehydration steps at fixed partial pressure model equations. Surprisingly, kinetic parameters obtained found depend on ma...

Journal: :Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2013

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