Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

Abstract Rashba spin-orbit splitting in the magnetic materials opens up a new perspective in the field of spintronics. Here, we report a giant Rashba spin-orbit splitting on the PrGe [010] surface in the paramagnetic phase with Rashba coefficient α R = 5 eVÅ. We find that α R can be tuned in this s...

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Autores principales:	Soma Banik, Pranab Kumar Das, Azzedine Bendounan, Ivana Vobornik, A. Arya, Nathan Beaulieu, Jun Fujii, A. Thamizhavel, P. U. Sastry, A. K. Sinha, D. M. Phase, S. K. Deb
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9dc3a471241a4d608bde4bcb43f9fb43
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spelling	oai:doaj.org-article:9dc3a471241a4d608bde4bcb43f9fb432021-12-02T11:52:38ZGiant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics10.1038/s41598-017-02401-z2045-2322https://doaj.org/article/9dc3a471241a4d608bde4bcb43f9fb432017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02401-zhttps://doaj.org/toc/2045-2322Abstract Rashba spin-orbit splitting in the magnetic materials opens up a new perspective in the field of spintronics. Here, we report a giant Rashba spin-orbit splitting on the PrGe [010] surface in the paramagnetic phase with Rashba coefficient α R = 5 eVÅ. We find that α R can be tuned in this system as a function of temperature at different magnetic phases. Rashba type spin polarized surface states originates due to the strong hybridization between Pr 4f states with the conduction electrons. Significant changes observed in the spin polarized surface states across the magnetic transitions are due to the competition between Dzyaloshinsky-Moriya interaction and exchange interaction present in this system. Presence of Dzyaloshinsky-Moriya interaction on the topological surface give rise to Saddle point singularity which leads to electron-like and hole-like Rashba spin split bands in the $$\bar{{\boldsymbol{Z}}}^{\prime} -\bar{{\boldsymbol{\Gamma }}}-\bar{{\boldsymbol{Z}}}$$ Z ¯ ′ − Γ ¯ − Z ¯ and $$\bar{{\boldsymbol{X}}}^{\prime} -\bar{{\boldsymbol{\Gamma }}}-\bar{{\boldsymbol{X}}}$$ X ¯ ′ − Γ ¯ − X ¯ directions, respectively. Supporting evidences of Dzyaloshinsky-Moriya interaction have been obtained as anisotropic magnetoresistance with respect to field direction and first-order type hysteresis in the X-ray diffraction measurements. A giant negative magnetoresistance of 43% in the antiferromagnetic phase and tunable Rashba parameter with temperature makes this material a suitable candidate for application in the antiferromagnetic spintronic devices.Soma BanikPranab Kumar DasAzzedine BendounanIvana VobornikA. AryaNathan BeaulieuJun FujiiA. ThamizhavelP. U. SastryA. K. SinhaD. M. PhaseS. K. DebNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Soma Banik Pranab Kumar Das Azzedine Bendounan Ivana Vobornik A. Arya Nathan Beaulieu Jun Fujii A. Thamizhavel P. U. Sastry A. K. Sinha D. M. Phase S. K. Deb Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
description	Abstract Rashba spin-orbit splitting in the magnetic materials opens up a new perspective in the field of spintronics. Here, we report a giant Rashba spin-orbit splitting on the PrGe [010] surface in the paramagnetic phase with Rashba coefficient α R = 5 eVÅ. We find that α R can be tuned in this system as a function of temperature at different magnetic phases. Rashba type spin polarized surface states originates due to the strong hybridization between Pr 4f states with the conduction electrons. Significant changes observed in the spin polarized surface states across the magnetic transitions are due to the competition between Dzyaloshinsky-Moriya interaction and exchange interaction present in this system. Presence of Dzyaloshinsky-Moriya interaction on the topological surface give rise to Saddle point singularity which leads to electron-like and hole-like Rashba spin split bands in the $$\bar{{\boldsymbol{Z}}}^{\prime} -\bar{{\boldsymbol{\Gamma }}}-\bar{{\boldsymbol{Z}}}$$ Z ¯ ′ − Γ ¯ − Z ¯ and $$\bar{{\boldsymbol{X}}}^{\prime} -\bar{{\boldsymbol{\Gamma }}}-\bar{{\boldsymbol{X}}}$$ X ¯ ′ − Γ ¯ − X ¯ directions, respectively. Supporting evidences of Dzyaloshinsky-Moriya interaction have been obtained as anisotropic magnetoresistance with respect to field direction and first-order type hysteresis in the X-ray diffraction measurements. A giant negative magnetoresistance of 43% in the antiferromagnetic phase and tunable Rashba parameter with temperature makes this material a suitable candidate for application in the antiferromagnetic spintronic devices.
format	article
author	Soma Banik Pranab Kumar Das Azzedine Bendounan Ivana Vobornik A. Arya Nathan Beaulieu Jun Fujii A. Thamizhavel P. U. Sastry A. K. Sinha D. M. Phase S. K. Deb
author_facet	Soma Banik Pranab Kumar Das Azzedine Bendounan Ivana Vobornik A. Arya Nathan Beaulieu Jun Fujii A. Thamizhavel P. U. Sastry A. K. Sinha D. M. Phase S. K. Deb
author_sort	Soma Banik
title	Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
title_short	Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
title_full	Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
title_fullStr	Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
title_full_unstemmed	Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics
title_sort	giant rashba effect at the topological surface of prge revealing antiferromagnetic spintronics
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9dc3a471241a4d608bde4bcb43f9fb43
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Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

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