Multiferroic Two-Dimensional Materials

Tipo
Artigo
Data de publicação
2016
Periódico
Physical Review Letters
Citações (Scopus)
189
Autores
Seixas L.
Rodin A.S.
Carvalho A.
Castro Neto A.H.
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Resumo
© 2016 American Physical Society.The relation between unusual Mexican-hat band dispersion, ferromagnetism, and ferroelasticity is investigated using a combination of analytical, first-principles, and phenomenological methods. The class of material with Mexican-hat band edge is studied using the α-SnO monolayer as a prototype. Such a band edge causes a van Hove singularity diverging with 1/E, and a charge doping in these bands can lead to time-reversal symmetry breaking. Herein, we show that a material with Mexican-hat band dispersion, α-SnO, can be ferroelastic or paraelastic depending on the number of layers. Also, an unexpected multiferroic phase is obtained in a range of hole density for which the material presents ferromagnetism and ferroelasticity simultaneously.
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Assuntos Scopus
Band dispersions , Ferroelasticity , First principles , Multiferroic phase , Number of layers , Time reversal symmetries , Two-dimensional materials , Van Hove singularities
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