skip to main content

SciTech ConnectSciTech Connect

Title: Mechanical Removal and Rescreening of Local Screening Charges at Ferroelectric Surfaces

In this paper, we report the kinetics of screening charge removal and rescreening on periodically poled lithium niobate using charge-gradient microscopy and electrostatic force microscopy (EFM). A minimum pressure needs to be applied to initiate mechanical screening charge removal, and increasing the pressure leads to further removal of charge until a threshold is reached when all screening charges are removed. We fit all rescreening EFM contrast curves under various pressures into a universal exponential decay. Finally, the findings imply that we can control the screening degree of ferroelectric surfaces by mechanical means without affecting the polarization underneath.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Nanoscience and Technology Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
OSTI Identifier:
1357474
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; charge gradient microscopy; electrostatic force microscopy; ferroelectric surface; kinetics of adsorption; piezoresponse force microscopy