Back to Search
Start Over
Non-linear ballistic response of quantum spin-Hall edge states
- Publication Year :
- 2021
-
Abstract
- Topological edge states exhibit dissipationless transport and electrically-driven topological phase transitions, making them ideal for next-generation transistors that are not constrained by Moore's law. Nevertheless, their dispersion has never been probed and is often assumed to be simply linear, without any rigorous justification. Here we determine the non-linear electrical response of topological edge states in the ballistic regime and demonstrate the way this response ascertains the presence of symmetry breaking terms in the edge dispersion, such as deviations from non-linearity and tilted spin quantization axes. The non-linear response stems from discontinuities in the band occupation on either side of a Zeeman gap, and its direction is set by the spin orientation with respect to the Zeeman field. We determine the edge dispersion for several classes of topological materials and discuss experimental measurement.<br />8 pages, 4 figures
- Subjects :
- Physics
Condensed Matter - Materials Science
Zeeman effect
Condensed matter physics
Field (physics)
Condensed Matter - Mesoscale and Nanoscale Physics
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
Classification of discontinuities
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
01 natural sciences
Nonlinear system
symbols.namesake
Quantization (physics)
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
Dispersion (optics)
symbols
Symmetry breaking
010306 general physics
0210 nano-technology
Spin (physics)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....7e55fae6a63d32df76cfb0a1a0028f0e