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Title: Partial charge transfer and absence of induced magnetization in EuS(111)/Bi2Se3 heterostructures

Abstract

We report that heterostructures made from topological and magnetic insulators promise to form excellent platforms for new electronic and spintronic functionalities mediated by interfacial effects. We report the results of a first-principles density functional theory study of the geometric, electronic structure, and magnetic properties of the EuS( 111 )/Bi2Se3 interface, including van der Waals and relativistic spin-orbit effects. In contrast to previous theoretical studies, we find no appreciable magnetic anisotropy in such a heterostructure. We also do not see additional induced magnetization at the interface or the magnetic proximity effect on the topological states. This is due to the localized nature of Eu moments and because of a partial charge transfer of ~ 0.5 electron from Eu to Se. The formation of the surface dipole shifts the Dirac cone about 0.4 eV below the chemical potential, and the associated electrostatic screening moves the topological state from the first to the second quintuple layer of Bi2Se3 .

Authors:
ORCiD logo [1];  [1];  [2];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Rensselaer Polytechnic Inst., Troy, NY (United States)
Publication Date:
Research Org.:
Louisiana State Univ., Baton Rouge, LA (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Louisiana Board of Regents; National Science Foundation (NSF)
OSTI Identifier:
1851621
Grant/Contract Number:  
SC0012432; DMR-1410741
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 104; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; density of states; electronic structure; electronic structure of atoms; molecules; first-principles calculations; magnetic anisotropy; sign-orbit coupling; surface states; topological materials

Citation Formats

Tristant, Damien, Vekhter, Ilya, Meunier, Vincent, and Shelton, William A. Partial charge transfer and absence of induced magnetization in EuS(111)/Bi2Se3 heterostructures. United States: N. p., 2021. Web. doi:10.1103/physrevb.104.075128.
Tristant, Damien, Vekhter, Ilya, Meunier, Vincent, & Shelton, William A. Partial charge transfer and absence of induced magnetization in EuS(111)/Bi2Se3 heterostructures. United States. https://doi.org/10.1103/physrevb.104.075128
Tristant, Damien, Vekhter, Ilya, Meunier, Vincent, and Shelton, William A. Tue . "Partial charge transfer and absence of induced magnetization in EuS(111)/Bi2Se3 heterostructures". United States. https://doi.org/10.1103/physrevb.104.075128. https://www.osti.gov/servlets/purl/1851621.
@article{osti_1851621,
title = {Partial charge transfer and absence of induced magnetization in EuS(111)/Bi2Se3 heterostructures},
author = {Tristant, Damien and Vekhter, Ilya and Meunier, Vincent and Shelton, William A.},
abstractNote = {We report that heterostructures made from topological and magnetic insulators promise to form excellent platforms for new electronic and spintronic functionalities mediated by interfacial effects. We report the results of a first-principles density functional theory study of the geometric, electronic structure, and magnetic properties of the EuS( 111 )/Bi2Se3 interface, including van der Waals and relativistic spin-orbit effects. In contrast to previous theoretical studies, we find no appreciable magnetic anisotropy in such a heterostructure. We also do not see additional induced magnetization at the interface or the magnetic proximity effect on the topological states. This is due to the localized nature of Eu moments and because of a partial charge transfer of ~ 0.5 electron from Eu to Se. The formation of the surface dipole shifts the Dirac cone about 0.4 eV below the chemical potential, and the associated electrostatic screening moves the topological state from the first to the second quintuple layer of Bi2Se3 .},
doi = {10.1103/physrevb.104.075128},
journal = {Physical Review. B},
number = 7,
volume = 104,
place = {United States},
year = {Tue Aug 17 00:00:00 EDT 2021},
month = {Tue Aug 17 00:00:00 EDT 2021}
}

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