نتایج جستجو برای: anisotropy evolution

تعداد نتایج: 374147  

Journal: :Physical review letters 1996
Liu Lagally

By calculating the evolution of surface energies and surface stress tensors of Ge-covered Si(001) with increasing Ge coverage, we derive the most probable Ge stoichiometry in the subsurface regions beyond 1 monolayer coverage. We compare the calculated surface reconstruction and surface stress at the thermodynamic and kinetic limits to experiment to provide a quantitative understanding of the r...

2008
D. Jou M. Sciacca

We include the effects of anisotropy and polarization in the hydrodynamics of inhomogeneous vortex tangles, thus generalizing the well known Hall-Vinen-Bekarevich-Khalatnikov equations, which do not take them in consideration. These effects contribute to the mutual friction force Fns between normal and superfluid components and to the vortex tension force ρsT. These equations are complemented b...

2001
Pasi Huovinen

We use a hydrodynamical model to describe the evolution of the collision system at collision energies √ s = 130 and 200 GeV. At lower √ s = 130 GeV energy we compare the results obtained assuming fast or slow thermalization (thermalization times τ0 = 0.6 and 4.1 fm/c, respectively) and show that slow thermalization fails to reproduce the observed anisotropy of particle distribution. At √ s = 20...

2013
A. Chambolle M. Novaga

We prove short-time existence of φ-regular solutions to the planar anisotropic curvature flow, including the crystalline case, with an additional forcing term possibly unbounded and discontinuous in time, such as for instance a white noise. We also prove uniqueness of such solutions when the anisotropy is smooth and elliptic. The main tools are the use of an implicit variational scheme in order...

Journal: :Physical review letters 2008
C Tegenkamp T Ohta J L McChesney H Dil E Rotenberg H Pfnür K Horn

The Pb/Si(557) system exhibits a strong anisotropy in conductance below 78 K, with the evolution of a characteristic chain structure. Here we show, using angle-resolved photoemission, that chain ordering results in complete Fermi-like nesting in the direction normal to the chains; in addition, the domain structure along the chains forms split-off valence bands with mesoscopic Fermi wavelengths ...

1995
Wayne Hu

These lecture notes form a primer on the theory of cosmic microwave background (CMB) anisotropy formation. With emphasis on conceptual aspects rather than technical issues, we examine the physical foundations of anisotropy evolution in relativistic kinetic and perturbation theory as well as the manifestation of these principles in primary and secondary anisotropies. We discuss gauge choice and ...

Journal: :The Journal of chemical physics 2011
Yoshi-Ichi Suzuki Takuya Horio Takao Fuji Toshinori Suzuki

Ultrafast internal conversion of benzene and toluene from the S(2) states was studied by time-resolved photoelectron imaging with a time resolution of 22 fs. Time-energy maps of the photoelectron intensity and the angular anisotropy were generated from a series of photoelectron images. The photoelectron kinetic energy distribution exhibits a rapid energy shift and intensity revival, which indic...

2009
Mauricio Martinez

We calculate leading-order dilepton yields from a quark-gluon plasma which has a timedependent anisotropy in momentum space. Such anisotropies can arise during the earliest stages of quark-gluon plasma evolution due to the rapid longitudinal expansion of the created matter. A phenomenological model for the proper time dependence of the parton hard momentum scale, phard , and the plasma anisotro...

2009
R. S. Qin

An expression is proposed for the anisotropy of interfacial energy of cubic metals, based on the symmetry of the crystal structure. The associated coefficients can be determined experimentally or assessed using computational methods. Calculations demonstrate an average relative error of <3% in comparison with the embedded-atom data for face-centred cubic metals. For body-centred-cubic metals, t...

Journal: :Nanoscale 2013
Oral Ualibek Ruggero Verre Brendan Bulfin Victor Usov Karsten Fleischer John F McGilp Igor V Shvets

Highly ordered self-assembled silver nanoparticle (NP) arrays have been produced by glancing angle deposition on faceted c-plane Al2O3 templates. The NP shape can be tuned by changing the substrate temperature during deposition. Reflectance anisotropy spectroscopy has been used to monitor the plasmonic evolution of the sample during the growth. The structures showed a strong dichroic response r...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید