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Title: Manipulating the polar mismatch at the LaNi O 3 / SrTi O 3 (111) interface

Abstract

Heteroepitaxial growth of transition-metal oxide films on the open (111) surface of SrTi O 3 results in significant restructuring due to the polar mismatch. Monitoring the structure and composition on an atomic scale of LaNi O 3 / SrTi O 3 (111) interface as a function of processing conditions has enabled the avoidance of the expected polar catastrophe. Using atomically resolved transmission electron microscopy and spectroscopy as well as low-energy electron diffraction, the structure of the thin film, from interface to the surface, has been studied. Here, we show that the proper processing can lead to a structure that is ordered, coherent with the substrate without intermediate structural phase. Using angle-resolved x-ray photoemission spectroscopy we show that the oxygen content of thin films increases with the film thickness, which indicates that the polar mismatch is avoided by the presence of oxygen vacancies.

Authors:
 [1];  [2];  [1];  [3];  [1];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  2. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1372442
Alternate Identifier(s):
OSTI ID: 1352464
Report Number(s):
BNL-114015-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: MA015MACA; KC0201010; TRN: US1702669
Grant/Contract Number:  
SC00112704; SC0002136; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 16; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Saghayezhian, M., Wang, Zhen, Guo, Hangwen, Zhu, Yimei, Plummer, E. W., and Zhang, Jiandi. Manipulating the polar mismatch at the LaNiO3/SrTiO3 (111) interface. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.165434.
Saghayezhian, M., Wang, Zhen, Guo, Hangwen, Zhu, Yimei, Plummer, E. W., & Zhang, Jiandi. Manipulating the polar mismatch at the LaNiO3/SrTiO3 (111) interface. United States. doi:10.1103/PhysRevB.95.165434.
Saghayezhian, M., Wang, Zhen, Guo, Hangwen, Zhu, Yimei, Plummer, E. W., and Zhang, Jiandi. Thu . "Manipulating the polar mismatch at the LaNiO3/SrTiO3 (111) interface". United States. doi:10.1103/PhysRevB.95.165434. https://www.osti.gov/servlets/purl/1372442.
@article{osti_1372442,
title = {Manipulating the polar mismatch at the LaNiO3/SrTiO3 (111) interface},
author = {Saghayezhian, M. and Wang, Zhen and Guo, Hangwen and Zhu, Yimei and Plummer, E. W. and Zhang, Jiandi},
abstractNote = {Heteroepitaxial growth of transition-metal oxide films on the open (111) surface of SrTi O 3 results in significant restructuring due to the polar mismatch. Monitoring the structure and composition on an atomic scale of LaNi O 3 / SrTi O 3 (111) interface as a function of processing conditions has enabled the avoidance of the expected polar catastrophe. Using atomically resolved transmission electron microscopy and spectroscopy as well as low-energy electron diffraction, the structure of the thin film, from interface to the surface, has been studied. Here, we show that the proper processing can lead to a structure that is ordered, coherent with the substrate without intermediate structural phase. Using angle-resolved x-ray photoemission spectroscopy we show that the oxygen content of thin films increases with the film thickness, which indicates that the polar mismatch is avoided by the presence of oxygen vacancies.},
doi = {10.1103/PhysRevB.95.165434},
journal = {Physical Review B},
number = 16,
volume = 95,
place = {United States},
year = {2017},
month = {4}
}

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