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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