Gradient flow approach to an exponential thin film equation: global existence and latent singularity

Y Gao, JG Liu, XY Lu - ESAIM: Control, Optimisation and Calculus of …, 2019 - esaim-cocv.org
In this work, we study a fourth order exponential equation, ut= Δe− Δu derived from thin film
growth on crystal surface in multiple space dimensions. We use the gradient flow method in …

Weak solution of a continuum model for vicinal surface in the attachment-detachment-limited regime

Y Gao, JG Liu, J Lu - SIAM Journal on Mathematical Analysis, 2017 - SIAM
We study in this work a continuum model derived from a one-dimensional attachment-
detachment-limited type step flow on a vicinal surface, u_t=-u^2(u^3)_hhhh, where u …

[HTML][HTML] Global strong solution with BV derivatives to singular solid-on-solid model with exponential nonlinearity

Y Gao - Journal of Differential Equations, 2019 - Elsevier
In this work, we consider the one dimensional very singular fourth-order equation for solid-
on-solid model in attachment-detachment-limit regime with exponential nonlinearity …

Existence Theorems for a Crystal Surface Model Involving the -Laplace Operator

X Xu - SIAM Journal on Mathematical Analysis, 2018 - SIAM
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 …

Analytical validation of a continuum model for the evolution of a crystal surface in multiple space dimensions

JG Liu, X Xu - SIAM Journal on Mathematical Analysis, 2017 - SIAM
In this paper we are concerned with the existence of a weak solution to the initial boundary
value problem for the equation ∂u∂t=Δ łeft (Δ u\right)^-3. This problem arises in the …

Maximal monotone operator theory and its applications to thin film equation in epitaxial growth on vicinal surface

Y Gao, JG Liu, XY Lu, X Xu - Calculus of Variations and Partial Differential …, 2018 - Springer
In this work we consider 1 w_t=\left\left (w_ hh+ c_0\right)^-3\right _ hh,\qquad w (0)= w^ 0,
wt= w hh+ c 0-3 hh, w (0)= w 0, which is derived from a thin film equation for epitaxial growth …

Mathematical validation of a continuum model for relaxation of interacting steps in crystal surfaces in 2 space dimensions

X Xu - Calculus of Variations and Partial Differential …, 2020 - Springer
In this paper we study the boundary value problem for the equation div\left (D (∇ u) ∇\left
(div\left (| ∇ u|^ p-2 ∇ u+ β ∇ u| ∇ u|\right)\right)\right)+ au= f div D (∇ u)∇ div|∇ u| p-2∇ …

Long time behavior of dynamic solution to Peierls--Nabarro dislocation model

Y Gao, JG Liu - arXiv preprint arXiv:1907.02002, 2019 - arxiv.org
In this paper we study the relaxation process of Peierls-Nabarro dislocation model, which is
a gradient flow with singular nonlocal energy and double well potential describing how the …

A vicinal surface model for epitaxial growth with logarithmic free energy

Y Gao, H Ji, JG Liu, TP Witelski - arXiv preprint arXiv:1705.02924, 2017 - arxiv.org
We study a continuum model for solid films that arises from the modeling of one-dimensional
step flows on a vicinal surface in the attachment-detachment-limited regime. The resulting …

Bunching instability and asymptotic properties in epitaxial growth with elasticity effects: continuum model

T Luo, Y Xiang, NK Yip - arXiv preprint arXiv:2204.10051, 2022 - arxiv.org
We study the continuum epitaxial model for elastic interacting atomic steps on vicinal
surfaces proposed by Xiang and E (Xiang, SIAM J. Appl. Math. 63: 241-258, 2002; Xiang …