Stability and semi-classical limit in a semiconductor full quantum hydrodynamic model with non-flat doping profile

TL;DR

This paper investigates the stability and semi-classical limit of a full quantum hydrodynamic model for semiconductors with non-flat doping, providing new theoretical insights and convergence results.

Contribution

It establishes the existence, stability, and semi-classical limit of solutions in a one-dimensional quantum hydrodynamic model with non-flat doping profiles.

Findings

Proved existence and asymptotic stability of stationary solutions.

Established semi-classical limit results with convergence rates.

Used energy methods and fixed-point theorems for analysis.

Abstract

We present the new results on stability and semi-classical limit in a semiconductor full quantum hydrodynamic (FQHD) model with non-flat doping profile. The FQHD model can be used to analyze the thermal and quantum influences on the transport of carriers (electrons or holes) in semiconductor device. Inspired by the physical motivation, we consider the initial-boundary value problem of this model over the one-dimensional bounded domain and adopt the ohmic contact boundary condition and the vanishing bohmenian-type boundary condition. Firstly, the existence and asymptotic stability of a stationary solution are proved by Leray- Schauder fixed-point theorem, Schauder fixed-point theorem and the refined energy method. Secondly, we show the semi-classical limit results for both stationary solutions and global solutions by the elaborate energy estimates and the compactness argument. The strong convergence rates of the related asymptotic sequences of solutions are also obtained.