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Domain WallsFrom Fundamental Properties to Nanotechnology Concepts$
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Dennis Meier, Jan Seidel, Marty Gregg, and Ramamoorthy Ramesh

Print publication date: 2020

Print ISBN-13: 9780198862499

Published to Oxford Scholarship Online: October 2020

DOI: 10.1093/oso/9780198862499.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use.date: 21 May 2022

Landau–Ginzburg–Devonshire Theory for Domain Wall Conduction and Observation of Microwave Conduction of Domain Walls

Landau–Ginzburg–Devonshire Theory for Domain Wall Conduction and Observation of Microwave Conduction of Domain Walls

Chapter:
(p.271) Chapter 12 Landau–Ginzburg–Devonshire Theory for Domain Wall Conduction and Observation of Microwave Conduction of Domain Walls
Source:
Domain Walls
Author(s):

A. Tselev

A. V. Ievlev

R. Vasudevan

S. V. Kalinin

P. Maksymovych

A. Morozovska

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198862499.003.0012

This chapter concerns DW electrical conduction. It first addresses the phenomenology of charged domain walls in the context of a Landau-Ginzburg-Devonshire (LGD) model for the ferroelectric semiconductor with analysis of the DW conductivity associated with accumulation of charge carriers near domain walls. It is revealed that there exists an interplay between the wall type — head-to-head or tail-to-tail — and conduction type of the semiconductor ferroelectric with a strong dependence of the domain wall conductivity on the wall orientation. The chapter then reviews observations of high-frequency — in the gigahertz frequency range — ac conductivity along the nominally uncharged 180-degree domain walls in a uniaxial Pb(Zr0.2Ti0.8)O3 epitaxial film. Measurements of the conduction at high frequencies are insensitive to presence of a Schottky barrier and the electrode-ferroelectric interface.

Keywords:   domain wall electrical conduction, Landau-Ginzburg Devonshire model, LGD model, ferroelectric semiconductor, microwave conduction, domain wall conduction, domain wall conductivity

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