Special Issue "Advances in Topological Materials: Fundamentals, Challenges and Outlook, Volume II"
Deadline for manuscript submissions: 20 January 2024 | Viewed by 3201
Interests: topological insulators; topological phase transition; theory of semiconductor nanostructures; k·p method; ab-initio calculations
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Special Issue in Crystals: Group-III Nitride Quantum Wells
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. 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. Subsequently, the Dirac and Weyl semimetals with topologically protected, linearly dispersing bands in the bulk band structure have joined the family of topological materials. Recently, the higher-order topological insulators in which the gapless states appear on the boundary with dimensions two or more lower than that of the bulk have been discovered. Higher-order topological phases have been observed both in solid-state materials and in photonic and acoustic metamaterials.
This is the second volume of the Special Issue on “Advances in Topological Materials: Fundamentals, Challenges, and Outlook”. In this Special Issue, we focus on topological nanomaterials, nanostructures, and nano-metamaterials. Research on the topological effects at the nanoscale not only leads to the observation of new phenomena, such as Majorana fermions in topological nanowires but is also primarily important for the application of topological materials and metamaterials in modern electronic, acoustic, and optical devices. This Special Issue aims to highlight the latest state-of-the-art studies on the topological effects in nanomaterials, nanostructures, and nano-metamaterials.
Prof. Dr. Sławomir P. Łepkowski
Manuscript Submission Information
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- topological insulators
- Dirac semimetals
- Weyl semimetals
- topological phase transition
- Majorana fermions
- quantum dots
- topological photonics
- topological acoustics
- topological devices