Reference : Polarization vortices in germanium telluride nanoplatelets: A theoretical study
Scientific journals : Letter to the editor
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/32089
Polarization vortices in germanium telluride nanoplatelets: A theoretical study
English
Durgun, Engin mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
Ghosez, Philippe mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
Shaltaf, R. [> >]
Gonze, X. [> >]
Raty, Jean-Yves mailto [Université de Liège - ULg > Département de physique > Physique de la matière condensée >]
2009
Physical Review Letters
American Physical Society
103
247601
Yes (verified by ORBi)
International
0031-9007
1079-7114
Ridge
NY
[en] ab initio ; nanostructure ; ferroelectrics
[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.
Researchers ; Professionals
http://hdl.handle.net/2268/32089
10.1103/PhysRevLett.103.247601
http://link.aps.org/doi/10.1103/PhysRevLett.103.247601

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