) for elastic contact, the time rate of stress increasing is determined by the contact geometry and
Henan Polytechnic University
By using the nonequilibrium Green's function formalism in combination with the density functional theory, we have studied the electronic transport properties of three phenazine derivatives which are linked to gold electrodes through thiol-gold bonds. We can see that the currents through the top configurations are remarkably larger than that of hollow ones. That is to say, the contact position does affect the electronic transport properties. We also find that the molecule devices exhibited negative differential resistance phenomenon when the metal-molecule contact model is top. The mechanisms are proposed for these phenomena.
Ph.D. Programs Foundation of Ministry of Education of China（20130131110007）
School of Physics, Shandong University, Jinan 250100, China,School of Physics, Shandong University, Jinan 250100, China,School of Physics, Shandong University, Jinan 250100, China
In this article, for a compact special Legendrian submanifold withboundary of contact Calabi-Yau manifolds we study the deformationof it with boundary confined in an appropriately chosen contactsubmanifold of codimension two which we also call a scafford(Definition 4) by analogy with Butsher.Our result shows that it cannot bedeformed under such a boundary confinement. This result may be viewedas supplements of the compact boundless case considered by Tomassini andVezzoni.
Research Fund for theDoctoral Program Higher Education of China （200800270003）
The first author is supported by NationalNatural Science Foundation （Grant No. 10971014）
School of Mathematical Sciences, Beijing Normal University, Beijing 100875,Department of Mathematics, China University of Petroleum, Beijing 102249