2024-03-28T21:40:18Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1767232021-12-28T15:47:07Zcom_10261_115com_10261_3col_10261_368
00925njm 22002777a 4500
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Klimovskikh, Ilya I.
author
Shikin, Alexander M.
author
Otrokov, M. M.
author
Ernst, Arthur
author
Rusinov, Igor P.
author
Tereshchenko, Oleg E.
author
Golyashov, V. A.
author
Sánchez-Barriga, J.
author
Varykhalov, A. Yu.
author
Rader, O.
author
Kokh, Konstantin A.
author
Chulkov, Eugene V.
author
2017
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.
Scientific Reports 7: 3353 (2017)
http://hdl.handle.net/10261/176723
10.1038/s41598-017-03507-0
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100004285
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100008566
http://dx.doi.org/10.13039/501100006769
28611416
Giant magnetic band gap in the rashba-split surface state of vanadium-doped BiTeI: A combined photoemission and Ab initio study