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Title: Crystal truncation rods from miscut surfaces

Abstract

Crystal truncation rods are used to study surface and interface structure. Since real surfaces are always somewhat miscut from a low index plane, it is important to study the effect of miscuts on crystal truncation rods. We develop a model that describes the truncation rod scattering from miscut surfaces that have steps and terraces. We show that nonuniform terrace widths and jagged step edges are both forms of roughness that decrease the intensity of the rods. Nonuniform terrace widths also result in a broad peak that overlaps the rods. We use our model to characterize the terrace width distribution and step edge jaggedness on three SrTiO 3 (001) samples, showing excellent agreement between the model and the data, confirmed by atomic force micrographs of the surface morphology. As a result, we expect our description of terrace roughness will apply to many surfaces, even those without obvious terracing.

Authors:
 [1];  [2];  [2];  [1]
  1. Stanford Univ., Palo Alto, CA (United States); The Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Lab., and Stanford Univ., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1368755
Alternate Identifier(s):
OSTI ID: 1355956
Grant/Contract Number:  
AC02-76SF00515; ECCS-1542152
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 18; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Petach, Trevor A., Mehta, Apurva, Toney, Michael F., and Goldhaber-Gordon, David. Crystal truncation rods from miscut surfaces. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.184104.
Petach, Trevor A., Mehta, Apurva, Toney, Michael F., & Goldhaber-Gordon, David. Crystal truncation rods from miscut surfaces. United States. doi:10.1103/PhysRevB.95.184104.
Petach, Trevor A., Mehta, Apurva, Toney, Michael F., and Goldhaber-Gordon, David. Mon . "Crystal truncation rods from miscut surfaces". United States. doi:10.1103/PhysRevB.95.184104. https://www.osti.gov/servlets/purl/1368755.
@article{osti_1368755,
title = {Crystal truncation rods from miscut surfaces},
author = {Petach, Trevor A. and Mehta, Apurva and Toney, Michael F. and Goldhaber-Gordon, David},
abstractNote = {Crystal truncation rods are used to study surface and interface structure. Since real surfaces are always somewhat miscut from a low index plane, it is important to study the effect of miscuts on crystal truncation rods. We develop a model that describes the truncation rod scattering from miscut surfaces that have steps and terraces. We show that nonuniform terrace widths and jagged step edges are both forms of roughness that decrease the intensity of the rods. Nonuniform terrace widths also result in a broad peak that overlaps the rods. We use our model to characterize the terrace width distribution and step edge jaggedness on three SrTiO3 (001) samples, showing excellent agreement between the model and the data, confirmed by atomic force micrographs of the surface morphology. As a result, we expect our description of terrace roughness will apply to many surfaces, even those without obvious terracing.},
doi = {10.1103/PhysRevB.95.184104},
journal = {Physical Review B},
number = 18,
volume = 95,
place = {United States},
year = {Mon May 08 00:00:00 EDT 2017},
month = {Mon May 08 00:00:00 EDT 2017}
}

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Works referenced in this record:

Structural Basis for the Conducting Interface between LaAlO3 and SrTiO3
journal, October 2007


Atomic Control of the SrTiO3 Crystal Surface
journal, December 1994