By means of density functional theory based calculations, we study the role of spin-orbit coupling in the new family of ABC hyperferroelectrics [Garrity, Rabe, and Vanderbilt Phys. Rev. Lett. 112, 127601 (2014)]. We unveil an extremely rich physics strongly linked to ferroelectric properties, ranging from the electric control of bulk Rashba effect to the existence of a three-dimensional topological insulator phase, with concomitant topological surface states even in the ultrathin film limit. Moreover, we predict that the topological transition, as induced by alloying, is followed by a Weyl semimetal phase of finite concentration extension, which is robust against disorder, putting forward hyperferroelectrics as promising candidates for spin-orbitronic applications.

Di Sante, D., Barone, P., Stroppa, A., Garrity, K., Vanderbilt, D., Picozzi, S. (2016). Intertwined Rashba, Dirac, and Weyl Fermions in Hexagonal Hyperferroelectrics. PHYSICAL REVIEW LETTERS, 117(7), 076401-076401 [10.1103/PhysRevLett.117.076401].

Intertwined Rashba, Dirac, and Weyl Fermions in Hexagonal Hyperferroelectrics

Di Sante, D.
Primo
;
2016

Abstract

By means of density functional theory based calculations, we study the role of spin-orbit coupling in the new family of ABC hyperferroelectrics [Garrity, Rabe, and Vanderbilt Phys. Rev. Lett. 112, 127601 (2014)]. We unveil an extremely rich physics strongly linked to ferroelectric properties, ranging from the electric control of bulk Rashba effect to the existence of a three-dimensional topological insulator phase, with concomitant topological surface states even in the ultrathin film limit. Moreover, we predict that the topological transition, as induced by alloying, is followed by a Weyl semimetal phase of finite concentration extension, which is robust against disorder, putting forward hyperferroelectrics as promising candidates for spin-orbitronic applications.
2016
Di Sante, D., Barone, P., Stroppa, A., Garrity, K., Vanderbilt, D., Picozzi, S. (2016). Intertwined Rashba, Dirac, and Weyl Fermions in Hexagonal Hyperferroelectrics. PHYSICAL REVIEW LETTERS, 117(7), 076401-076401 [10.1103/PhysRevLett.117.076401].
Di Sante, D.; Barone, P.; Stroppa, A.; Garrity, K.F.; Vanderbilt, D.; Picozzi, S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/871528
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