Photoelectron spin polarization in the Bi2Te3 (0001) topological insulator: Initial- and final-state effects in the photoemission process
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F16%3A43929035" target="_blank" >RIV/49777513:23640/16:43929035 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1103/PhysRevB.93.245150" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.93.245150</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.93.245150" target="_blank" >10.1103/PhysRevB.93.245150</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Photoelectron spin polarization in the Bi2Te3 (0001) topological insulator: Initial- and final-state effects in the photoemission process
Popis výsledku v původním jazyce
The photoelectron spin polarization in angle-resolved photoemission from the topological surface state in Bi2 Te3(0001) has been investigated in a combined experimental and theoretical study. Our measurements show significant photon-energy-dependent deviations in the three-dimensional spin polarization of the photoelectron when compared to the expected intrinsic spin polarization of the surface state. The experimental observations are in line with relativistic one-step photoemission calculations. Our theoretical analysis confirms that spin-orbit coupling in the initial-state wave functions in combination with the dipole selection rules strongly influences the photoelectron spin polarization. Furthermore, spin-dependent final-state effects are found to influence the spin polarization significantly. A quantitative access to the three-dimensional spin-polarization vector in topological insulators is thus challenged by a complex interplay of initial- and final-state effects in the photoemission process.
Název v anglickém jazyce
Photoelectron spin polarization in the Bi2Te3 (0001) topological insulator: Initial- and final-state effects in the photoemission process
Popis výsledku anglicky
The photoelectron spin polarization in angle-resolved photoemission from the topological surface state in Bi2 Te3(0001) has been investigated in a combined experimental and theoretical study. Our measurements show significant photon-energy-dependent deviations in the three-dimensional spin polarization of the photoelectron when compared to the expected intrinsic spin polarization of the surface state. The experimental observations are in line with relativistic one-step photoemission calculations. Our theoretical analysis confirms that spin-orbit coupling in the initial-state wave functions in combination with the dipole selection rules strongly influences the photoelectron spin polarization. Furthermore, spin-dependent final-state effects are found to influence the spin polarization significantly. A quantitative access to the three-dimensional spin-polarization vector in topological insulators is thus challenged by a complex interplay of initial- and final-state effects in the photoemission process.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
BM - Fyzika pevných látek a magnetismus
OECD FORD obor
—
Návaznosti výsledku
Projekt
<a href="/cs/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
PHYSICAL REVIEW B
ISSN
2469-9950
e-ISSN
—
Svazek periodika
93
Číslo periodika v rámci svazku
24
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
8
Strana od-do
'245150-1'-'245150-8'
Kód UT WoS článku
000378816000005
EID výsledku v databázi Scopus
2-s2.0-84976866987