Static conductivity of charged domain walls in uniaxial ferroelectric semiconductors
By Eugene A. Eliseev, Anna N. Morozovska, G. Svechnikov, Venkatraman Gopalan, V. Shur. 2011
204 citations recorded by the source corpus.
Using Landau-Ginzburg-Devonshire theory we calculated numerically the static conductivity of both inclined and counter domain walls in the uniaxial ferroelectrics-semiconductors of n-type. We used the effective mass approximation for the electron and holes density of states, which is valid at arbitrary distance from the domain wall. Due to the electrons accumulation, the static conductivity drastically increases at the inclined head-to-head wall by 1 order of magnitude for small incline angles theta pi/40 by up 3 orders of magnitude for the counter domain wall (theta=pi/2). Two separate regions of the space charge accumulation exist across an inclined tail-to-tail wall: the thin region in the immediate vicinity of the wall with accumulated mobile holes and the much wider region with ionized donors. The conductivity across the tail-to-tail wall is at least an order of magnitude smaller than the one of the head-to-head wall due to the low mobility of holes, which are improper carries. The results are in qualitative agreement with recent experimental data for LiNbO3 doped with MgO.
Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/6aa0a62f561a93d685bd1aa39ecdec88f882bbc7
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Biomedical Engineering
In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- Domain wall nanoelectronics (2012, background): “…tail to tail, due to the different availability of majority carriers; for example, in an n-type semiconductor, there is an abundance of electrons, and so head-to-head domain walls can be efficiently screened, while tail-to-tail cannot, meaning that the latter will be broader (Eliseev et al., 2011).”