Observation of systematic deviations of period in W/Si and W/C multilayers

Wu, Liwen; Liu, Wenhan; Zhang, Shuyuan; Wu, Ziqin

doi:10.1063/1.359711

Cited by 20 publications

(28 citation statements)

References 18 publications

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“…This is a remarkable result because, regardless of the degree distribution, the network at β = 1 is just as synchronizable as a random homogeneous network with the same mean degree, and random homogeneous networks appear to be asymptotically optimal in the sense that R approaches the absolute lower bound in the thermodynamical limit for large enough k [9].…”

Section: A Mean Degree Approximationmentioning

confidence: 81%

“…Another basic assumption of previous work is that the oscillators are coupled symmetrically and with the same coupling strength [8]. Under the assumption of symmetric coupling, the maximum synchronizability may be indeed achieved when the coupling strength is uniform [9]. But to get a better synchronizability, the couplings are not necessarily symmetrical.…”

Section: Introductionmentioning

confidence: 99%

“…The interplay between network structure and dynamics has attracted a great deal of attention in connection with a variety of processes [1], including epidemic spreading [2], congestion and cascading failures [3], and synchronization of coupled oscillators [4,5,6,7,8,9,10,11]. Much of this interest has been prompted by the discovery that numerous real-world networks [1] share universal structural features, such as the small-world [12] and scale-free properties [13].…”

Section: Introductionmentioning

confidence: 99%

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Network synchronization, diffusion, and the paradox of heterogeneity

2005

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Many complex networks display strong heterogeneity in the degree (connectivity) distribution. Heterogeneity in the degree distribution often reduces the average distance between nodes but, paradoxically, may suppress synchronization in networks of oscillators coupled symmetrically with uniform coupling strength. Here we offer a solution to this apparent paradox. Our analysis is partially based on the identification of a diffusive process underlying the communication between oscillators and reveals a striking relation between this process and the condition for the linear stability of the synchronized states. We show that, for a given degree distribution, the maximum synchronizability is achieved when the network of couplings is weighted and directed, and the overall cost involved in the couplings is minimum. This enhanced synchronizability is solely determined by the mean degree and does not depend on the degree distribution and system size. Numerical verification of the main results is provided for representative classes of small-world and scale-free networks.

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Section: A Mean Degree Approximationmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Network synchronization, diffusion, and the paradox of heterogeneity

2005

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“…(3) yields a novel thermal exponent for the temperature dependence of ξ T as ν T = 1/(4 + ε) beyond the scaling ansatz. In contrast, typically scaling-ansatz-breakdown behaviors are observed in systems equal to or above the upper critical dimension [39,40].…”

mentioning

confidence: 94%

Quantum criticality of bosonic systems with the Lifshitz dispersion

Zhou

2017

Phys. Rev. B

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We study the quantum criticality of the Lifshitz ϕ 4 -theory below the upper critical dimension. Two fixed points, one Gaussian and the other non-Gaussian, are identified with zero and finite interaction strengths, respectively. At zero temperature the particle density exhibits different powerlaw dependences on the chemical potential in the weak and strong interaction regions. At finite temperatures, critical behaviors in the quantum disordered region are mainly controlled by the chemical potential. In contrast, in the quantum critical region critical scalings are determined by temperature. The scaling ansatz remains valid in the strong interaction limit for the chemical potential, correlation length, and particle density, while it breaks down in the weak interaction one. As approaching the upper critical dimension, physical quantities develop logarithmic dependence on dimensionality in the strong interaction region. These results are applied to spin-orbit coupled bosonic systems, leading to predictions testable by future experiments. Introduction.-Quantum phase transitions, uniquely driven by quantum fluctuations, appear when the ground state energy encounters non-analyticity via tuning a nonthermal parameter. Physical properties around quantum critical points (QCPs) are of extensive interests because the interplay between quantum and thermal critical fluctuations strongly influence the dynamical and thermodynamic quantities, giving rise to rich quantum critical properties beyond the classical picture [1,2]. Quantum critical fluctuations are believed to be responsible for various emergent phenomena, including the non-Fermi liquid behaviors in heavy fermion systems, unconventional superconductivity, and novel spin dynamics in onedimensional quantum magnets [3][4][5][6].

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“…There were a few prior studies investigated the stability of iron oxide nanoparticles in ionic strength media [19,20], but focused on the short term effect, i.e., a few days.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable iron oxide nanoparticle dispersions in high ionic media

Nourafkan

Asachi

Gao

et al. 2017

Journal of Industrial and Engineering Chemistry

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Graphical abstract2 ABSTRACT A novel one-pot method was developed in this work to synthesize and disperse nanoparticles in a binary base fluid. As an example, stable magnetite iron oxide (Fe3O4) dispersions, i.e., nanofluids, were produced in a high ionic media of binary lithium bromide-water using a microemulsion-mediated method. The effects of temperature and precursor concentration on morphology and size distribution of produced nanoparticles were evaluated. An effective steric repulsion force was provided by the surface functionalization of nanoparticles during the phase transfer, supported by the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The formed nanoparticles exhibited a superior stability against agglomeration in the presence of high concentrations of lithium bromide, i.e., from 20 to 50 wt.%, which make them good candidates for a range of novel applications.

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Observation of systematic deviations of period in W/Si and W/C multilayers

Cited by 20 publications

References 18 publications

Network synchronization, diffusion, and the paradox of heterogeneity

Network synchronization, diffusion, and the paradox of heterogeneity

Quantum criticality of bosonic systems with the Lifshitz dispersion

Synthesis of stable iron oxide nanoparticle dispersions in high ionic media

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