Celebradavie 16 oct 2026,
Engineering novel quantum phases with germanene
El germaneno, una lámina de germanio del grosor de un átomo, y cómo sus bordes conducen electricidad sin perder energía.
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La defensa
De la agenda de University of Twente
- Cuándo
- vie 16 oct 2026, 90 min
- Dónde
- University of Twente, Países BajosScience & Technology (TNW)
- Campos
- Dirección
- H.J.W. Zandvlietfaculty of Science & Technology (TNW), University of Twente
- P. Bampoulisfaculty of Science & Technology (TNW), University of Twente
- Idioma
- inglés
- Grabación
- La grabación aún no está disponible
Sobre la tesis
The thesis examines germanene, a two-dimensional topological insulator with a sizeable band gap, and explores its topological properties and their possible uses and limits in low-energy electronics. It focuses on the quantum spin Hall effect, which allows dissipationless transport along material edges.
The work finds that germanene keeps these topological properties at room temperature, with robust metallic edge states that an external electric field can switch on and off. Edge termination influences Fermi velocity, with armchair edges higher than zigzag edges. In nanoribbons, the dimensional limits of the quantum spin Hall phase are studied: ribbons wider than about 2.6 nm show pronounced edge states, while narrower ones can become a one-dimensional topological crystalline phase with end states.
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