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At low temperatures the critical state in superconducting films can be unstable with respect to thermomagnetic dendritic avalanches. By numerical simulations of disk-shaped superconductors, we consider how the dynamics and morphology of the…

超导电性 · 物理学 2013-09-26 J. I. Vestgarden , Y. M. Galperin , T. H. Johansen

Transport characteristics of single crystal bismuth films on Si(111)-7 \times 7 are found to be metallic or insulating at temperature below or above TC, respectively. The transition temperature TC decreases as the film thickness increases.…

介观与纳米尺度物理 · 物理学 2010-05-21 F. Pang , X. J. Liang , Z. L. Liao , S. L. Yin , D. M. Chen

It was experimentally found that the evolution of dielectric loss with processing temperature displays a common trend in ferroelectric and dielectric thin oxide films: firstly an increase and then a decrease in dielectric loss when the…

材料科学 · 物理学 2009-11-13 X. H. Zhu , B. Guigues , E. Defay , M. Aid

We propose a physical model which explains the existence of finite thickness wetting layers in epitaxially strained films. The finite wetting layer is shown to be stable due to the variation of the non-linear elastic free energy with film…

材料科学 · 物理学 2009-10-31 Helen R. Eisenberg , Daniel kandel

It is shown using numerical simulations that flow patterns around an obstacle potential moving in a superfluid exhibit hysteresis. In a certain velocity region, there is a bistability between stationary laminar flow and periodic vortex…

量子气体 · 物理学 2015-06-19 Tsuyoshi Kadokura , Jun Yoshida , Hiroki Saito

Cupric oxide single crystal thin films were grown by plasma-assisted molecular beam epitaxy. X-ray diffraction, Raman spectrum and in situ reflection high-energy electron diffraction show that the thin films are 2x2 reconstructed with an…

材料科学 · 物理学 2017-01-04 K. G. Yang , S. X. Wu , F. M. Yu , W. Q. Zhou , Y. J. Wang , M. Meng , G. L. Wang , Y. L. Zhang , S. W. Li

Using dynamic simulations and analytic methods, we study the elastic response of a helical filament subject to uniaxial tension over a wide range of bend and twist persistence length. A low-pitch helix at low temperatures exhibits a…

软凝聚态物质 · 物理学 2008-03-31 Hirofumi Wada , Roland R. Netz

A simple and predictive model is put forward explaining the experimentally observed substantial shift of the glass transition temperature, Tg, of sufficiently thin polymer films. It focuses on the limit of small molecular weight, where…

软凝聚态物质 · 物理学 2009-11-07 Stephan Herminghaus , Karin Jacobs , Ralf Seemann

This study investigates the temperature-induced hysteretic behavior of resistivity and magnetoresistance in electrodeposited bismuth films, with a focus on their application as absorbers in transition-edge sensors (TESs) for X-ray…

We present a comparative investigation of the influence of crystallinity and film thickness on the acoustic and thermal properties of 2D layered PtSe2 thin films of varying thickness (0.6-24 nm) by combining a set of experimental…

A droplet of a classical liquid surrounded by a cold gas placed on a hot substrate is accompanied by unremitting internal circulations, while the droplet remains immobile. Two identical cells with opposite sense of circulation form in the…

流体动力学 · 物理学 2023-12-12 Aaveg Aggarwal , Eleftherios Kirkinis , Monica Olvera de la Cruz

Thermal conductivity of a model glass-forming system in the liquid and glass states is studied using extensive numerical simulations. We show that near the glass transition temperture, where the structural relaxation time becomes very long,…

无序系统与神经网络 · 物理学 2020-02-26 Pranab Jyoti Bhuyan , Rituparno Mandal , Pinaki Chaudhuri , Abhishek Dhar , Chandan Dasgupta

At ultralow temperatures, polymers exhibit quantum behavior, which is calculated here for the second and fourth moments of the end-to-end distribution in the large-stiffness regime. The result should be measurable for polymers in wide…

软凝聚态物质 · 物理学 2009-10-20 H. Kleinert

Pump-probe experiments and polarizing microscopy are applied to examine temperature and heat flow in metallic magnetic superlattices on glass substrates. A model of heat diffusion in thin layers for cylindrical symmetry, equivalent to the…

介观与纳米尺度物理 · 物理学 2017-12-06 F. Hoveyda , M. Adnani , S. Smadici

The dynamic and static properties of a supercooled (non-entangled) polymer melt are investigated via molecular dynamics (MD) simulations. The system is confined between two completely smooth and purely repulsive walls. The wall-to-wall…

软凝聚态物质 · 物理学 2007-05-23 Fathollah Varnik , Joerg Baschnagel , Kurt Binder

We perform numerical and experimental studies on the melting process of thin films initiated by a small hole. The presence of a non-trivial capillary surface, namely the liquid/air interface, leads to a few counter-intuitive results: (1)…

化学物理 · 物理学 2023-06-21 Chenyu Jin , Hans Riegler

Thermoelectric films and periodic structures have particularly intriguing electrical and thermal transport features due to their low dimensionality. As a result, they have piqued the attention of researchers from across the spectrum of…

材料科学 · 物理学 2024-02-23 Nagaraj Nandihalli

When the thickness of the layer is smaller than the electrons mean free path, the morphology affects the conductivity directly based on the layer thickness. This issue provides basis in order to estimate the thickness of the layer by…

介观与纳米尺度物理 · 物理学 2015-06-16 M. Jannesar , G. R. Jafari , S. Vasheghani Farahani , S. Moradi

A variational model for epitaxially-strained thin films on rigid substrates is derived both by {\Gamma}-convergence from a transition-layer setting, and by relaxation from a sharp-interface description available in the literature for…

偏微分方程分析 · 数学 2018-09-20 Elisa Davoli , Paolo Piovano

Hysteresis has been observed in a study of the transition between laminar flow and vortex shedding in a quasi-two dimensional system. The system is a vertical, rapidly flowing soap film which is penetrated by a rod oriented perpendicular to…

软凝聚态物质 · 物理学 2009-10-31 V. K. Horvath , J. R. Cressman , W. I. Goldburg , X. L. Wu