| Title: | Identifikace bulkových a povrchových Rashba stavů v ferroelektrickém GeTe Identifikace bulkových a povrchových Rashba stavů v ferroelektrickém GeTe Disentangling bulk and surface Rashba effects in ferroelectric α-GeTe |
| Authors: | Krempaský, Július Volfová, Henrieta Muff, Stefan Pilet, Nicolas Landolt, Gabriel Radović, Miroslav Shi, Ming Kriegner, Dominik Holý, Václav Braun, Jürgen W. Ebert, Hubert Bisti, Federico Rogalev, Victor A. Strocov, Vladimir N. Springholz, Gunther Minár, Jan Dil, Jan Hugo |
| Citation: | Physical review B, 2016, roč. 94, č. 20, s. 2051111-2051117. ISSN 2469-9950. |
| Issue Date: | 2016 |
| Publisher: | American Physical Society |
| Document type: | článek article |
| URI: | http://hdl.handle.net/11025/25699 https://www.scopus.com/record/display.uri?origin=resultslist&eid=2-s2.0-84994639281 |
| ISSN: | 2469-9950 |
| Keywords: | topologické izolátory;feroelektrizumus |
| Keywords in different language: | ferroelectricity;topological insulators |
| Abstract: | Identifikace bulkových a povrchových Rashba stavů v ferroelektrickém GeTe |
| Abstract in different language: | Macroscopic ferroelectric order in α-GeTe with its noncentrosymmetric lattice structure leads to a giant Rashba spin splitting in the bulk bands due to strong spin-orbit interaction. Direct measurements of the bulk band structure using soft x-ray angle-resolved photoemission (ARPES) reveals the three-dimensional electronic structure with spindle torus shape. By combining high-resolution and spin-resolved ARPES as well as photoemission calculations, the bulk electronic structure is disentangled from the two-dimensional surface electronic structure by means of surface capping, which quenches the complex surface electronic structure. This unravels the bulk Rashba-split states in the ferroelectric Rashba α-GeTe(111) semiconductor exhibiting a giant spin splitting with Rashba parameter αR around 4.2 eV A°, the highest of so-far known materials. |
| Rights: | © American Physical Society |
| Appears in Collections: | Články / Articles (CTM) OBD |
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|---|---|---|---|
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