Structure Inversion Asymmetry and Rashba Effect in Quantum Confined Topological Crystalline Insulator Heterostructures
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00122451" target="_blank" >RIV/00216224:14310/21:00122451 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/adfm.202008885" target="_blank" >https://doi.org/10.1002/adfm.202008885</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adfm.202008885" target="_blank" >10.1002/adfm.202008885</a>
Alternative languages
Result language
angličtina
Original language name
Structure Inversion Asymmetry and Rashba Effect in Quantum Confined Topological Crystalline Insulator Heterostructures
Original language description
Structure inversion asymmetry is an inherent feature of quantum confined heterostructures with non-equivalent interfaces. It leads to a spin splitting of the electron states and strongly affects the electronic band structure. The effect is particularly large in topological insulators because the topological surface states are extremely sensitive to the interfaces. Here, the first experimental observation and theoretical explication of this effect are reported for topological crystalline insulator quantum wells made of Pb1-xSnxSe confined by Pb1-yEuySe barriers on one side and by vacuum on the other. This provides a well defined structure asymmetry controlled by the surface condition. The electronic structure is mapped out by angle-resolved photoemission spectroscopy and tight binding calculations, evidencing that the spin splitting decisively depends on hybridization and, thus, quantum well width. Most importantly, the topological boundary states are not only split in energy but also separated in space-unlike conventional Rashba bands that are splitted only in momentum. The splitting can be strongly enhanced to very large values by control of the surface termination due to the charge imbalance at the polar quantum well surface. The findings thus, open up a wide parameter space for tuning of such systems for device applications.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Functional Materials
ISSN
1616-301X
e-ISSN
1616-3028
Volume of the periodical
31
Issue of the periodical within the volume
23
Country of publishing house
DE - GERMANY
Number of pages
13
Pages from-to
„2008885“
UT code for WoS article
000634542200001
EID of the result in the Scopus database
2-s2.0-85103413519