تقرير
Observation of Weyl and Dirac fermions at smooth topological Volkov-Pankratov heterojunctions
| العنوان: | Observation of Weyl and Dirac fermions at smooth topological Volkov-Pankratov heterojunctions |
|---|---|
| المؤلفون: | Bermejo-Ortiz, J., Krizman, G., Jakiela, R., Khosravizadeh, Z., Hajlaoui, M., Bauer, G., Springholz, G., de Vaulchier, L. A., Guldner, Y. |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Other Condensed Matter |
| الوصف: | Weyl and Dirac relativistic fermions are ubiquitous in topological matter. Their relativistic character enables high energy physics phenomena like the chiral anomaly to occur in solid state, which allows to experimentally probe and explore fundamental relativistic theories. Here we show that on smooth interfaces between a trivial and a topological material, massless Weyl and massive Dirac fermions intrinsically coexist. The emergence of the latter, known as Volkov-Pankratov states, is directly revealed by magneto-optical spectroscopy, evidencing that their energy spectrum is perfectly controlled by the smoothness of topological interface. Simultaneously, we reveal the optical absorption of the zero-energy chiral Weyl state, whose wavefunction is drastically transformed when the topological interface is smooth. Artificial engineering of the topology profile thus provides a novel textbook system to explore the rich relativistic energy spectra in condensed matter heterostructures. Comment: 21 pages 10 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.075129 |
| URL الوصول: | http://arxiv.org/abs/2207.09292 |
| رقم الأكسشن: | edsarx.2207.09292 |
| قاعدة البيانات: | arXiv |
كن أول من يترك تعليقا!