[en] Using first-principles calculations based on density functional theory, we study the properties of
germanium telluride crystalline nanoplatelets and nanoparticles. Above a diameter of 2.7 nm, we predict the appearance of polarization vortices giving rise to an unusual ferrotoroidic ground state with a spontaneous and reversible toroidal moment of polarization. We highlight the crucial role of inhomogeneous strain in stabilizing polarization vortices. Combined with the phase-change properties of germanium telluride, the ferrotoroidic properties could be of practical interest for ternary logic applications.
Disciplines :
Physics
Author, co-author :
Durgun, Engin ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Ghosez, Philippe ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Shaltaf, R.
Gonze, X.
Raty, Jean-Yves ; Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Language :
English
Title :
Polarization vortices in germanium telluride nanoplatelets: A theoretical study
Publication date :
2009
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
J. Akola and R.O. Jones, Phys. Rev. B PRBMDO 1098-0121 76, 235201 (2007). 10.1103/PhysRevB.76.235201
K. Shportko, S. Kremers, M. Woda, D. Lencer, J. Robertson, and M. Wuttig, Nature Mater. 7, 653 (2008). NMAACR 1476-1122 10.1038/nmat2226
W. Welnic, S. Botti, L. Reining, and M. Wuttig, Phys. Rev. Lett. 98, 236403 (2007). PRLTAO 0031-9007 10.1103/PhysRevLett.98.236403
K.M. Rabe and J.D. Joannopoulos, Phys. Rev. B PRBMDO 0163-1829 36, 6631 (1987). 10.1103/PhysRevB.36.6631
R. Shaltaf, E. Durgun, J.-Y. Raty, Ph. Ghosez, and X. Gonze, Phys. Rev. B PRBMDO 1098-0121 78, 205203 (2008). 10.1103/PhysRevB.78.205203
J. Junquera and Ph. Ghosez, Nature (London) 422, 506 (2003). NATUAS 0028-0836 10.1038/nature01501
I. Ponomareva, I. Naumov, I. Kornev, H. Fu, and L. Bellaiche, Curr. Opin. Solid State Mater. Sci. COSSFX 1359-0286 9, 114 (2005). 10.1016/j.cossms.2006. 05.003
I. Naumov, L. Bellaiche, and H. Fu, Nature (London) 432, 737 (2004). NATUAS 0028-0836 10.1038/nature03107
H. Fu and L. Bellaiche, Phys. Rev. Lett. 91, 257601 (2003). PRLTAO 0031-9007 10.1103/PhysRevLett.91.257601
S. Prosandeev, I. Ponomareva, I. Kornev, I. Naumov, and L. Bellaiche, Phys. Rev. Lett. 96, 237601 (2006). PRLTAO 0031-9007 10.1103/PhysRevLett.96. 237601
W. Kohn and L.J. Sham, Phys. Rev. PHRVAO 0031-899X 140, A1133 (1965); 10.1103/PhysRev.140.A1133
P. Hohenberg and W. Kohn, Phys. Rev. PHRVAO 0031-899X 136, B864 (1964). 10.1103/PhysRev.136.B864
G. Kresse and J. Hafner, Phys. Rev. B PRBMDO 0163-1829 47, 558 (1993); 10.1103/PhysRevB.47.558
G. Kresse and J. Furthmuller, Phys. Rev. B PRBMDO 0163-1829 54, 11169 (1996). 10.1103/PhysRevB.54.11169
L. Genovese, J. Chem. Phys. 129, 014109 (2008). JCPSA6 0021-9606 10.1063/1.2949547
This is what is expected in a classical framework, while zero-point quantum vibrations might influence the critical size. See, e.g., A.R. Akbarzadeh, Phys. Rev. B PRBMDO 1098-0121 70, 054103 (2004). 10.1103/PhysRevB.70.054103
S. Prosandeev, I. Kornev, and L. Bellaiche, Phys. Rev. B PRBMDO 1098-0121 76, 012101 (2007). 10.1103/PhysRevB.76.012101
M. Klein, S. Rogge, F. Remacle, and R.D. Levine, Nano Lett. NALEFD 1530-6984 7, 2795 (2007). 10.1021/nl071376e
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.