Digital and analog memory devices based on 2D layered MPS_(3) (M= Mn, Co, Ni) materials

We demonstrate digital and analog devices with an Ag/MPS_(3)/Au structure based on layered MPS_(3)(M=Mn,Co,Ni)2 D materials.All devices show the bipolar behavior of resistive switching.In addition,Ag/MnPS_(3)/Au and Ag/NiPS_(3)/Au devices show synaptic characteristics of potentiation and depression.The digital and analog characteristics of resistance states enable Ag/MPS_(3)/Au devices to work as both binary memory and artificial synapse devices.The Ag/MPS_(3)/Au memory devices are promising for applications of flexible eye-like and brain-like systems on a chip when they are integrated with photodetectors and FETs composed of full MPS_(3) materials.

Finite-Time Stability and Instability of Nonlinear Impulsive Systems

In this paper,the finite-time stability and instability are studied for nonlinear impulsive systems.There are mainly four concerns.1)For the system with stabilizing impulses,a Lyapunov theorem on global finite-time stability is presented.2)When the system without impulsive effects is globally finite-time stable(GFTS)and the settling time is continuous at the origin,it is proved that it is still GFTS over any class of impulse sequences,if the mixed impulsive jumps satisfy some mild conditions.3)For systems with destabilizing impulses,it is shown that to be finite-time stable,the destabilizing impulses should not occur too frequently,otherwise,the origin of the impulsive system is finite-time instable,which are formulated by average dwell time(ADT)conditions respectively.4)A theorem on finite-time instability is provided for system with stabilizing impulses.For each GFTS theorem of impulsive systems considered in this paper,the upper boundedness of settling time is given,which depends on the initial value and impulsive effects.Some numerical examples are given to illustrate the theoretical analysis.