RT Journal Article
T1 Tailoring topological states of core-shell nanoparticles
A1 Martínez Strasser, Carolina
A1 Baba, Yuriko
A1 Díaz Fernández, Álvaro
A1 Domínguez-Adame Acosta, Francisco
AB In this work we investigate novel spherical core-shell nanoparticles with band inversion. The core and the embedding medium are normal semiconductors while the shell material is assumed to be a topological insulator. The envelope functions are found to satisfy a Dirac-like equation that can be solved in a closed form. The core-shell nanoparticle supports midgap bound states located at both interfaces due to band inversion. These states are robust since they are topologically protected. The energy spectrum presents mirror symmetry due to the chiral symmetry of the Dirac-like Hamiltonian. As a major result, we show that the thickness of the shell acts as an additional parameter for the fine tuning of the energy levels, which paves the way for electronics and optoelectronics applications.
PB Elsevier Science BV
SN 1386-9477
YR 2022
FD 2022-02
LK https://hdl.handle.net/20.500.14352/72448
UL https://hdl.handle.net/20.500.14352/72448
LA eng
NO ©2022 ElsevierThis work was supported by Ministerio de Ciencia e Innovacion, Spain (Grant PID2019-106820RB-C21).
NO Ministerio de Ciencia e Innovación (MICINN)
DS Docta Complutense
RD 17 ago 2024