Advances in Topological Materials: Fundamentals, Challenges and Outlook
A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".
Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 27099
Special Issue Editor
Interests: topological insulators; topological phase transition; theory of semiconductor nanostructures; k∙p method; ab-initio calculations
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The discovery of the time-reversal topological insulators in two and three dimensions has greatly inspired the study of topological properties of the electronic band structure of crystalline materials. The topological insulators are characterized by an energy gap in the bulk electronic band structure and metallic states on the boundaries. Closing of the band gap by the surface or edge states is caused by nontrivial topology of the bulk states, originating from an inversion in the order in the valence and conduction bands at time reversal invariant wave vectors in the Brillouin zone. The search for other materials with nontrivial topological properties has led to the invention of the topological crystalline insulators in which the topological nature of the electronic structure arises from crystal symmetries. Then, the Dirac and Weyl semimetals with topologically protected, linearly dispersing bands in the bulk band structure have joined the family of the topological materials. Recently, the higher-order topological insulator in which the gapless states appear on the boundary with dimensions two or more lower than that of the bulk have been discovered.
In this Special Issue, we focus on the topological nanomaterials and nanostructures. Research on the topological effects at the nanoscale leads not only to the observation of new phenomena, like Majorana fermions in topological nanowires, but also is primarily important for the application of topological materials in modern electronic devices. This Special Issue aims to highlight the latest state-of-the-art studies on the topological effects in nanomaterials and nanostructures.
Prof. Dr. Sławomir P. Łepkowski
Guest Editor
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Keywords
- Topological insulators
- Dirac semimetals
- Weyl semimetals
- Topological phase transition
- Nanocrystals
- Nanowires
- Majorana fermions
- Quantum dots
- Topological devices
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