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Title: Built-in Electric Field Induced Mechanical Property Change at the Lanthanum Nickelate/Nb-doped Strontium Titanate Interfaces

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep19017· OSTI ID:1258610
 [1];  [2];  [1];  [3];  [4];  [5]
  1. Univ. of Wyoming, Laramie, WY (United States)
  2. Univ. of Arkansas, Fayetteville, AR (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Arkansas, Fayetteville, AR (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials

The interactions between electric field and the mechanical properties of materials are important for the applications of microelectromechanical and nanoelectromechanical systems, but relatively unexplored for nanoscale materials. Here, we observe an apparent correlation between the change of the fractured topography of Nb-doped SrTiO3 (Nb:STO) within the presence of a built-in electric field resulting from the Schottky contact at the interface of a metallic LaNiO3 thin film utilizing cross-sectional scanning tunneling microscopy and spectroscopy. The change of the inter-atomic bond length mechanism is argued to be the most plausible origin. This picture is supported by the strong-electric-field-dependent permittivity in STO and the existence of the dielectric dead layer at the interfaces of STO with metallic films. Finally, these results provided direct evidence and a possible mechanism for the interplay between the electric field and the mechanical properties on the nanoscale for perovskite materials.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-10ER46728; SC0004981; AC02-06CH11357
OSTI ID:
1258610
Alternate ID(s):
OSTI ID: 1258770
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Design of n - and p -type oxide thermoelectrics in LaNiO 3 / SrTiO 3 ( 001 ) superlattices exploiting interface polarity journal March 2017

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