Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators

Abstract Manipulation of electronic and magnetic properties of topological materials is a topic of much interest in spintronic and valleytronic applications. Perturbation tuning of multiple Dirac cones on the (001) surface of topological crystalline insulators (TCIs) is also a related topic of growi...

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Autores principales:	Hosein Cheraghchi, Mohsen Yarmohammadi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/38b464e190dc4aab9bc71bc5137ee198
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spelling	oai:doaj.org-article:38b464e190dc4aab9bc71bc5137ee1982021-12-02T11:35:53ZAnisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators10.1038/s41598-021-84398-02045-2322https://doaj.org/article/38b464e190dc4aab9bc71bc5137ee1982021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84398-0https://doaj.org/toc/2045-2322Abstract Manipulation of electronic and magnetic properties of topological materials is a topic of much interest in spintronic and valleytronic applications. Perturbation tuning of multiple Dirac cones on the (001) surface of topological crystalline insulators (TCIs) is also a related topic of growing interest. Here we show the numerical evidence for the ferroelectric structural distortion effects on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two magnetic impurity moments on the SnTe (001) and related alloys. The mirror symmetry breaking between Dirac cones induced by the ferroelectric distortion could be divided into various possible configurations including the isotropically gapped, coexistence of gapless and gapped, and anisotropically gapped phases. Based on the retarded perturbed Green’s functions of the generalized gapped Dirac model, we numerically find the RKKY response for each phase. The distortion-induced symmetry breaking constitutes complex and interesting magnetic responses between magnetic moments compared to the pristine TCIs. In the specific case of coexisted gapless and gapped phases, a nontrivial behavior of the RKKY interaction is observed, which has not been seen in other Dirac materials up until now. For two impurities resided on the same sublattices, depending on the distortion strength, magnetic orders above of a critical impurity separation exhibit irregular ferromagnetic ⇔ antiferromagnetic phase transitions. However, independent of the impurity separation and distortion strength, no phase transition emerges for two impurities resided on different sublattices. This essential study sheds light on magnetic properties of Dirac materials with anisotropic mass terms and also makes TCIs applications relatively easy to understand.Hosein CheraghchiMohsen YarmohammadiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-22 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hosein Cheraghchi Mohsen Yarmohammadi Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
description	Abstract Manipulation of electronic and magnetic properties of topological materials is a topic of much interest in spintronic and valleytronic applications. Perturbation tuning of multiple Dirac cones on the (001) surface of topological crystalline insulators (TCIs) is also a related topic of growing interest. Here we show the numerical evidence for the ferroelectric structural distortion effects on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two magnetic impurity moments on the SnTe (001) and related alloys. The mirror symmetry breaking between Dirac cones induced by the ferroelectric distortion could be divided into various possible configurations including the isotropically gapped, coexistence of gapless and gapped, and anisotropically gapped phases. Based on the retarded perturbed Green’s functions of the generalized gapped Dirac model, we numerically find the RKKY response for each phase. The distortion-induced symmetry breaking constitutes complex and interesting magnetic responses between magnetic moments compared to the pristine TCIs. In the specific case of coexisted gapless and gapped phases, a nontrivial behavior of the RKKY interaction is observed, which has not been seen in other Dirac materials up until now. For two impurities resided on the same sublattices, depending on the distortion strength, magnetic orders above of a critical impurity separation exhibit irregular ferromagnetic ⇔ antiferromagnetic phase transitions. However, independent of the impurity separation and distortion strength, no phase transition emerges for two impurities resided on different sublattices. This essential study sheds light on magnetic properties of Dirac materials with anisotropic mass terms and also makes TCIs applications relatively easy to understand.
format	article
author	Hosein Cheraghchi Mohsen Yarmohammadi
author_facet	Hosein Cheraghchi Mohsen Yarmohammadi
author_sort	Hosein Cheraghchi
title	Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
title_short	Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
title_full	Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
title_fullStr	Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
title_full_unstemmed	Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators
title_sort	anisotropic ferroelectric distortion effects on the rkky interaction in topological crystalline insulators
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/38b464e190dc4aab9bc71bc5137ee198
work_keys_str_mv	AT hoseincheraghchi anisotropicferroelectricdistortioneffectsontherkkyinteractionintopologicalcrystallineinsulators AT mohsenyarmohammadi anisotropicferroelectricdistortioneffectsontherkkyinteractionintopologicalcrystallineinsulators
_version_	1718395813781045248

Anisotropic ferroelectric distortion effects on the RKKY interaction in topological crystalline insulators

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