Surface states and breaking down of spin-to-surface locking on a conical topological insulator quantum dot

We study a conical topological insulator quantum dot and we show how the cone tip affects the surface states energy spectrum. This is obtained by analytically solving the Dirac equation for these charge carries whose dynamics is restricted to the conical surface. Besides of changing the wave-functio...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2022-11, Vol.95 (11), Article 178
Main Authors: Veiga, L. G., Moura-Melo, W. A.
Format: Article
Language:English
Subjects:
Complex Systems
Condensed Matter Physics
Conical bodies
Current carriers
Dirac equation
Energy spectra
Fluid- and Aerodynamics
Locking
Physics
Physics and Astronomy
Quantum dots
Regular Article - Solid State and Materials
Solid State Physics
Topological insulators
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Summary:We study a conical topological insulator quantum dot and we show how the cone tip affects the surface states energy spectrum. This is obtained by analytically solving the Dirac equation for these charge carries whose dynamics is restricted to the conical surface. Besides of changing the wave-functions and energy spectrum, the conical tip also yields breakdown of spin-to-surface locking in this geometry. Graphic abstract
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/s10051-022-00424-8