2024-03-28T23:38:27Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1020762016-02-18T02:49:37Zcom_10261_115com_10261_3col_10261_368
00925njm 22002777a 4500
dc
Eremeev, S. V.
author
Nechaev, I. A.
author
Koroteev, Yuri M.
author
Echenique, Pedro M.
author
Chulkov, Eugene V.
author
2012
Spintronics is aimed at actively controlling and manipulating the spin degrees of freedom in semiconductor devices. A promising way to achieve this goal is to make use of the tunable Rashba effect that relies on the spin-orbit interaction in a two-dimensional electron system immersed in an inversion-asymmetric environment. The spin-orbit-induced spin splitting of the two-dimensional electron state provides a basis for many theoretically proposed spintronic devices. However, the lack of semiconductors with large Rashba effect hinders realization of these devices in actual practice. Here we report on a giant Rashba-type spin splitting in two-dimensional electron systems that reside at tellurium-terminated surfaces of bismuth tellurohalides. Among these semiconductors, BiTeCl stands out for its isotropic metallic surface-state band with the Γ̄-point energy lying deep inside the bulk band gap. The giant spin splitting of this band ensures a substantial spin asymmetry of the inelastic mean free path of quasiparticles with different spin orientations. © 2012 American Physical Society.
Physical Review Letters 108: 246802 (2012)
http://hdl.handle.net/10261/102076
10.1103/PhysRevLett.108.246802
http://dx.doi.org/10.13039/501100004837
Ideal two-dimensional electron systems with a giant Rashba-type spin splitting in real materials: Surfaces of bismuth tellurohalides