Инд. авторы:	Klimovskikh I.I., Shikin A.M., Otrokov M.M., Ernst A., Rusinov I.P., Tereshchenko O.E., Golyashov V.A., Sánchez-Barriga J., Varykhalov A.Y., Rader O., Kokh K.A., Chulkov E.V.
Заглавие:	Giant Magnetic Band Gap in the Rashba-Split Surface State of Vanadium-Doped BiTeI: A Combined Photoemission and Ab Initio Study
Библ. ссылка:	Klimovskikh I.I., Shikin A.M., Otrokov M.M., Ernst A., Rusinov I.P., Tereshchenko O.E., Golyashov V.A., Sánchez-Barriga J., Varykhalov A.Y., Rader O., Kokh K.A., Chulkov E.V. Giant Magnetic Band Gap in the Rashba-Split Surface State of Vanadium-Doped BiTeI: A Combined Photoemission and Ab Initio Study // Scientific Reports. - 2017. - Vol.7. - Iss. 1. - Art.3353. - ISSN 2045-2322.
Внешние системы:	DOI: 10.1038/s41598-017-03507-0; РИНЦ: 31027537; PubMed: 28611416; SCOPUS: 2-s2.0-85020924348; WoS: 000403140000024;
Реферат:	eng: One of the most promising platforms for spintronics and topological quantum computation is the two-dimensional electron gas (2DEG) with strong spin-orbit interaction and out-of-plane ferromagnetism. In proximity to an s-wave superconductor, such 2DEG may be driven into a topologically non-Trivial superconducting phase, predicted to support zero-energy Majorana fermion modes. Using angle-resolved photoemission spectroscopy and ab initio calculations, we study the 2DEG at the surface of the vanadium-doped polar semiconductor with a giant Rashba-Type splitting, BiTeI. We show that the vanadium-induced magnetization in the 2DEG breaks time-reversal symmetry, lifting Kramers degeneracy of the Rashba-split surface state at the Brillouin zone center via formation of a huge gap of about 90 meV. As a result, the constant energy contour inside the gap consists of only one circle with spin-momentum locking. These findings reveal a great potential of the magnetically-doped semiconductors with a giant Rashba-Type splitting for realization of novel states of matter. © 2017 The Author(s).
Ключевые слова:	SUPERCONDUCTOR; ELECTRON-GAS; DIRAC-FERMION; BULK; WANNIER FUNCTIONS; MAJORANA FERMIONS; TOPOLOGICAL INSULATOR; GREEN-FUNCTIONS; APPROXIMATION;
Издано:	2017
Физ. характеристика:	3353