Existence Theorems for a Crystal Surface Model Involving the p-Laplace Operator
Existence Theorems for a Crystal Surface Model Involving the p-Laplace Operator
复制标题
涉及 p-拉普拉斯算子的晶体表面模型的存在定理
DOI:
10.1137/17m1157908
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Xiangsheng Xu
中科院分区:
文献类型:
--
作者:
Xiangsheng Xu
The manufacturing of crystal films lies at the heart of modern nanotechnology. How to accurately predict the motion of a crystal surface is of fundamental importance. Many continuum models have been developed for this purpose, including a number of PDE models, which are often obtained as the continuum limit of a family of kinetic Monte Carlo models of crystal surface relaxation that includes both the solid-on-solid and discrete Gaussian models. In this paper we offer an analytical perspective into some of these models. To be specific, we study the existence of a weak solution to the boundary value problem for the equation $ - \Delta e^{-\mbox{div}\left(|\nabla u|^{p-2}\nabla u\right)}+au=f$, where $p>1, a>0$ are given numbers and $f$ is a given function. This problem is derived from a crystal surface model proposed by J.L.~Marzuola and J.~Weare (2013 Physical Review, E 88, 032403). The mathematical challenge is due to the fact that the principal term in our equation is an exponential function of a p-Laplacian. Our investigations reveal that the key to our existence assertion is how to control the set where $-\mbox{div}\left(|\nabla u|^{p-2}\nabla u\right)$ is $\pm\infty$.
DOI:
10.1007/s00526-018-1326-x
发表时间:
2018
影响因子:
2.1
作者:
Gao, Yuan;Liu, Jian-Guo;Lu, Xin Yang;Xu, Xiangsheng
通讯作者:
Xu, Xiangsheng
DOI:
10.1051/cocv/2018037
发表时间:
2019
期刊:
Optimisation and Calculus of Variations
影响因子:
--
作者:
Gao, Yuan;Liu, Jian-Guo;Lu, Xin Yang
通讯作者:
Lu, Xin Yang