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Title: Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3

Abstract

Synthesizing monolayers and heterostructures is an enabling approach to extract new physical phenomena from bulk materials. Among the structures amenable to this approach is stanene, which is a monolayer of tin, similar to graphene, and has been predicted to host one-dimensional topological states at its edges. Stanene can be tuned by decorating with different adatoms, which makes it a promising platform on which to engineer topological devices. Here, we deposit Sn on Bi2Te3 and characterize the growth using anomalous synchrotron x-ray scattering and x-ray photoelectron spectroscopy (XPS). X-ray diffraction data reveal the formation of epitaxial Sn-based structures, along with penetration of Sn into the Bi2Te3, with Sn intercalating between the upper 10 Bi2Te3 quintuple layers. Additionally, XPS data show deposited Sn reacting to form SnTe and Bi at the Bi2Te3 surface. The calculated heat of reaction for Sn and Bi2Te3 is consistent with an exothermic reaction to SnTe and Bi. Using thermodynamic calculations as a guide, we identify several candidate substrates that can stabilize the stanene phase.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [1];  [3]; ORCiD logo [1];  [1];  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Univ. of British Columbia, Vancouver, BC (Canada)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Air Force Research Laboratory (AFRL); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1797907
Alternate Identifier(s):
OSTI ID: 1682370
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 128; Journal Issue: 16; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chalcogenides; Topological state; interface; Thermodynamic functions; Topological insulator; Heterostructures; Chemical reactions; X-ray photoelectron spectroscopy; Crystal structure; X-ray diffraction; X-ray scattering; Epitaxy

Citation Formats

Albright, Stephen D., Zou, Ke, Lau, Claudia, Eltinge, Stephen, Hong, Hawoong, Ismail-Beigi, Sohrab, Walker, Frederick J., and Ahn, Charles H. Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3. United States: N. p., 2020. Web. doi:10.1063/5.0020168.
Albright, Stephen D., Zou, Ke, Lau, Claudia, Eltinge, Stephen, Hong, Hawoong, Ismail-Beigi, Sohrab, Walker, Frederick J., & Ahn, Charles H. Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3. United States. https://doi.org/10.1063/5.0020168
Albright, Stephen D., Zou, Ke, Lau, Claudia, Eltinge, Stephen, Hong, Hawoong, Ismail-Beigi, Sohrab, Walker, Frederick J., and Ahn, Charles H. Wed . "Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3". United States. https://doi.org/10.1063/5.0020168. https://www.osti.gov/servlets/purl/1797907.
@article{osti_1797907,
title = {Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3},
author = {Albright, Stephen D. and Zou, Ke and Lau, Claudia and Eltinge, Stephen and Hong, Hawoong and Ismail-Beigi, Sohrab and Walker, Frederick J. and Ahn, Charles H.},
abstractNote = {Synthesizing monolayers and heterostructures is an enabling approach to extract new physical phenomena from bulk materials. Among the structures amenable to this approach is stanene, which is a monolayer of tin, similar to graphene, and has been predicted to host one-dimensional topological states at its edges. Stanene can be tuned by decorating with different adatoms, which makes it a promising platform on which to engineer topological devices. Here, we deposit Sn on Bi2Te3 and characterize the growth using anomalous synchrotron x-ray scattering and x-ray photoelectron spectroscopy (XPS). X-ray diffraction data reveal the formation of epitaxial Sn-based structures, along with penetration of Sn into the Bi2Te3, with Sn intercalating between the upper 10 Bi2Te3 quintuple layers. Additionally, XPS data show deposited Sn reacting to form SnTe and Bi at the Bi2Te3 surface. The calculated heat of reaction for Sn and Bi2Te3 is consistent with an exothermic reaction to SnTe and Bi. Using thermodynamic calculations as a guide, we identify several candidate substrates that can stabilize the stanene phase.},
doi = {10.1063/5.0020168},
journal = {Journal of Applied Physics},
number = 16,
volume = 128,
place = {United States},
year = {Wed Oct 28 00:00:00 EDT 2020},
month = {Wed Oct 28 00:00:00 EDT 2020}
}

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