Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI

Abstract Polar Rashba-type semiconductor BiTeI doped with magnetic elements constitutes one of the most promising platforms for the future development of spintronics and quantum computing thanks to the combination of strong spin-orbit coupling and internal ferromagnetic ordering. The latter originat...

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Autores principales:	A. M. Shikin, A. A. Rybkina, D. A. Estyunin, I. I. Klimovskikh, A. G. Rybkin, S. O. Filnov, A. V. Koroleva, E. V. Shevchenko, M. V. Likholetova, V. Yu. Voroshnin, A. E. Petukhov, K. A. Kokh, O. E. Tereshchenko, L. Petaccia, G. Di Santo, S. Kumar, A. Kimura, P. N. Skirdkov, K. A. Zvezdin, A. K. Zvezdin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9ca771dca13d48f4a7665aed7f43dd48
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spelling	oai:doaj.org-article:9ca771dca13d48f4a7665aed7f43dd482021-12-05T12:12:49ZNon-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI10.1038/s41598-021-02493-82045-2322https://doaj.org/article/9ca771dca13d48f4a7665aed7f43dd482021-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02493-8https://doaj.org/toc/2045-2322Abstract Polar Rashba-type semiconductor BiTeI doped with magnetic elements constitutes one of the most promising platforms for the future development of spintronics and quantum computing thanks to the combination of strong spin-orbit coupling and internal ferromagnetic ordering. The latter originates from magnetic impurities and is able to open an energy gap at the Kramers point (KP gap) of the Rashba bands. In the current work using angle-resolved photoemission spectroscopy (ARPES) we show that the KP gap depends non-monotonically on the doping level in case of V-doped BiTeI. We observe that the gap increases with V concentration until it reaches 3% and then starts to mitigate. Moreover, we find that the saturation magnetisation of samples under applied magnetic field studied by superconducting quantum interference device (SQUID) magnetometer has a similar behaviour with the doping level. Theoretical analysis shows that the non-monotonic behavior can be explained by the increase of antiferromagnetic coupled atoms of magnetic impurity above a certain doping level. This leads to the reduction of the total magnetic moment in the domains and thus to the mitigation of the KP gap as observed in the experiment. These findings provide further insight in the creation of internal magnetic ordering and consequent KP gap opening in magnetically-doped Rashba-type semiconductors.A. M. ShikinA. A. RybkinaD. A. EstyuninI. I. KlimovskikhA. G. RybkinS. O. FilnovA. V. KorolevaE. V. ShevchenkoM. V. LikholetovaV. Yu. VoroshninA. E. PetukhovK. A. KokhO. E. TereshchenkoL. PetacciaG. Di SantoS. KumarA. KimuraP. N. SkirdkovK. A. ZvezdinA. K. ZvezdinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. M. Shikin A. A. Rybkina D. A. Estyunin I. I. Klimovskikh A. G. Rybkin S. O. Filnov A. V. Koroleva E. V. Shevchenko M. V. Likholetova V. Yu. Voroshnin A. E. Petukhov K. A. Kokh O. E. Tereshchenko L. Petaccia G. Di Santo S. Kumar A. Kimura P. N. Skirdkov K. A. Zvezdin A. K. Zvezdin Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
description	Abstract Polar Rashba-type semiconductor BiTeI doped with magnetic elements constitutes one of the most promising platforms for the future development of spintronics and quantum computing thanks to the combination of strong spin-orbit coupling and internal ferromagnetic ordering. The latter originates from magnetic impurities and is able to open an energy gap at the Kramers point (KP gap) of the Rashba bands. In the current work using angle-resolved photoemission spectroscopy (ARPES) we show that the KP gap depends non-monotonically on the doping level in case of V-doped BiTeI. We observe that the gap increases with V concentration until it reaches 3% and then starts to mitigate. Moreover, we find that the saturation magnetisation of samples under applied magnetic field studied by superconducting quantum interference device (SQUID) magnetometer has a similar behaviour with the doping level. Theoretical analysis shows that the non-monotonic behavior can be explained by the increase of antiferromagnetic coupled atoms of magnetic impurity above a certain doping level. This leads to the reduction of the total magnetic moment in the domains and thus to the mitigation of the KP gap as observed in the experiment. These findings provide further insight in the creation of internal magnetic ordering and consequent KP gap opening in magnetically-doped Rashba-type semiconductors.
format	article
author	A. M. Shikin A. A. Rybkina D. A. Estyunin I. I. Klimovskikh A. G. Rybkin S. O. Filnov A. V. Koroleva E. V. Shevchenko M. V. Likholetova V. Yu. Voroshnin A. E. Petukhov K. A. Kokh O. E. Tereshchenko L. Petaccia G. Di Santo S. Kumar A. Kimura P. N. Skirdkov K. A. Zvezdin A. K. Zvezdin
author_facet	A. M. Shikin A. A. Rybkina D. A. Estyunin I. I. Klimovskikh A. G. Rybkin S. O. Filnov A. V. Koroleva E. V. Shevchenko M. V. Likholetova V. Yu. Voroshnin A. E. Petukhov K. A. Kokh O. E. Tereshchenko L. Petaccia G. Di Santo S. Kumar A. Kimura P. N. Skirdkov K. A. Zvezdin A. K. Zvezdin
author_sort	A. M. Shikin
title	Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
title_short	Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
title_full	Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
title_fullStr	Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
title_full_unstemmed	Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI
title_sort	non-monotonic variation of the kramers point band gap with increasing magnetic doping in bitei
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9ca771dca13d48f4a7665aed7f43dd48
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Non-monotonic variation of the Kramers point band gap with increasing magnetic doping in BiTeI

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